{"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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cstyle type\u003d\u0027text/css\u0027\u003e .input, .output {border: 1px solid #888888;} .output {margin-bottom:1em;position:relative;top:-1px;} .output pre,.input pre {background-color:#EFEFEF;line-height:1.25em;margin:0;padding:0.25em;} .title {background-color:#FFFFFF;border-bottom: 1px solid #888888;font-family:arial;font-weight:bold;padding:0.25em;} \u003c/style\u003e \u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027]], displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027]]}\n });\n \u003c/script\u003e\n \u003cscript type\u003d\"text/javascript\" async\n src\u003d\"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\"\u003e\n \u003c/script\u003e\n\n\u003cp\u003e Mushfiq is a very brilliant student. He is very serious before his exams. \u003c/p\u003e\n\n\u003cp\u003eHe is attending a viva-voce examination. As usual, Mushfiq has a very good preparation. His course teacher has become very tired asking him questions, because he has answered all of them correctly. \u003c/p\u003e\n\n\u003cp\u003eBut his course teacher don\u0027t want to give him full marks. So he gave Mushfiq 2 integers l and r. Then he asked Mushfiq to find out 2 integers a and b such that l ≤ a \u003c b ≤ r and l ≤ LCM(a, b) ≤ r \u003c/p\u003e\n\n\u003cp\u003eMushfiq is now on trouble because he wants to get full marks. So he asked for your help. Can you help Mushfiq?\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe first line contains one integer t, the number of test cases (1 ≤ t ≤ 10000) \u003c/p\u003e\n\n\u003cp\u003eEach test case is represented by one line containing two integers l and r (1 ≤ l \u003c r ≤ 10^9) \u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003eFor each test case, print two integers:\u003c/p\u003e\n\u003cul\u003e \n \u003cli\u003e if it is impossible to find integers a and b meeting the constraints in the statement, print two integers equal to -1 \u003c/li\u003e\n \u003cli\u003e otherwise, print the values of a and b (if there are multiple valid answers, you may print any of them). \u003c/li\u003e\n\u003c/ul\u003e"}},{"title":"Example","value":{"format":"HTML","content":"\u003cdiv class\u003d\"sample-test\"\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e4\n1 1447\n13 69\n2 4\n88 89\n\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e6 7\n14 21\n2 4\n-1 -1\n\u003c/pre\u003e\n \u003c/div\u003e\n\u003c/div\u003e"}}]}