{"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\u003cp\u003e已知 LCM(x, y) 为变量 x 和变量 y 的最小公倍数,例如 LCM(13, 37) \u003d 481, LCM(9, 6) \u003d 18。\u003c/p\u003e\n\u003cp\u003e雄雄(● ̄(エ) ̄●)学长有俩个数 l 和 r ,他想要得到另外俩个数 x 和 y ,满足l ≤ x ≤ y ≤ r,且 l ≤ LCM(x, y) ≤ r,你能帮帮他吗。\u003c/p\u003e\n"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003e第一行包含一个整数 t (1 ≤ t ≤ 10000) — 测试样例的组数。\u003c/p\u003e\n\u003cp\u003e每个测试样例为一行,包括俩个整数 l 和 r (1 ≤ l ; r ≤ 10^9).\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003e每个测试样例输出一行:\u003c/p\u003e\n\u003cul\u003e \n \u003cli\u003e 如果不可能找到满足语句约束的整数 x 和 y ,则输出两个 -1 ;\u003c/li\u003e\n \u003cli\u003e 否则,输出由空格隔开的俩个数 x 和 y(如果有多个有效答案,则可以输出其中的任何一个)。 \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\n2 4\n13 69\n1 1500\n91 92\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\u003e\n2 4\n14 21\n6 7\n-1 -1\n\u003c/pre\u003e\n \u003c/div\u003e\n\u003c/div\u003e"}}]}