{"trustable":false,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\u003cscript\u003e window.katexOptions \u003d { disable: true }; \u003c/script\u003e\n\u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {\n inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027], [\u0027$\u0027,\u0027$\u0027]],\n displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027], [\u0027$$\u0027,\u0027$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003eIn the near future Sabir will launch a new e-mail service \"codEye\", which will notify its students about the upcoming classes and ives that they will have. The administration of the site wants to launch its project as soon as possible, and I do not know why, but asks you to help. You are invited to implement a prototype of the registration system on the site. The system should work according to the following principle.\u003c/p\u003e\n\u003cp\u003eEach time a new user wants to register, he sends to the system a request with his \u003cspan class\u003d\"tex-font-style-tt\"\u003ename\u003c/span\u003e. If such a \u003cspan class\u003d\"tex-font-style-tt\"\u003ename\u003c/span\u003e does not exist in the system database, it is inserted into the database, and the user gets the response \u003cspan class\u003d\"tex-font-style-tt\"\u003eOK\u003c/span\u003e, confirming the successful registration. If the \u003cspan class\u003d\"tex-font-style-tt\"\u003ename\u003c/span\u003e already exists in the system database, the system makes up a new user name, sends it to the user as a prompt and \u003cspan class\u003d\"tex-font-style-it\"\u003ealso inserts the prompt into the database\u003c/span\u003e. The new name is formed by the following rule. Numbers, starting with 1, are appended one after another to \u003cspan class\u003d\"tex-font-style-tt\"\u003ename\u003c/span\u003e (\u003cspan class\u003d\"tex-font-style-tt\"\u003ename1\u003c/span\u003e, \u003cspan class\u003d\"tex-font-style-tt\"\u003ename2\u003c/span\u003e, ...), among these numbers the least \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ei\u003c/i\u003e\u003c/span\u003e is found so that \u003cspan class\u003d\"tex-font-style-tt\"\u003ename\u003c/span\u003e\u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ei\u003c/i\u003e\u003c/span\u003e does not yet exist in the database.\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe first line contains number \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e (\u003cspan class\u003d\"tex-span\"\u003e1 ≤ \u003ci\u003en\u003c/i\u003e ≤ 10\u003csup class\u003d\"upper-index\"\u003e5\u003c/sup\u003e\u003c/span\u003e). The following \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e lines contain the requests to the system. Each request is a non-empty line, and consists of not more than 32 characters, which are all lowercase Latin letters.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003ePrint \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e lines, which are system responses to the requests: \u003cspan class\u003d\"tex-font-style-tt\"\u003eOK\u003c/span\u003e in case of successful registration, or a prompt with a new name, if the requested name is already taken.\u003c/p\u003e"}},{"title":"Sample 1","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e4\nabacaba\nacaba\nabacaba\nacab\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eOK\nOK\nabacaba1\nOK\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Sample 2","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e6\nfirst\nfirst\nsecond\nsecond\nthird\nthird\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eOK\nfirst1\nOK\nsecond1\nOK\nthird1\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}