{"trustable":true,"prependHtml":"\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 async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\" type\u003d\"text/javascript\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cdiv class\u003d\"panel_content\"\u003eGiven three strings $a$, $b$ and $c$, your mission is to check whether $c$ is the combine string of $a$ and $b$.\u003cbr\u003eA string $c$ is said to be the combine string of $a$ and $b$ if and only if $c$ can be broken into two subsequences, when you read them as a string, one equals to $a$, and the other equals to $b$.\u003cbr\u003eFor example, ``adebcf\u0027\u0027 is a combine string of ``abc\u0027\u0027 and ``def\u0027\u0027.\u003cbr\u003e\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"Input file contains several test cases (no more than 20). Process to the end of file.\u003cbr\u003eEach test case contains three strings $a$, $b$ and $c$ (the length of each string is between 1 and 2000).\u003cbr\u003e"}},{"title":"Output","value":{"format":"HTML","content":"For each test case, print ``Yes\u0027\u0027, if $c$ is a combine string of $a$ and $b$, otherwise print ``No\u0027\u0027.\u003cbr\u003e"}},{"title":"Sample","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\u003eabc\r\ndef\r\nadebcf\r\nabc\r\ndef\r\nabecdf\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eYes\r\nNo\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}