{"trustable":false,"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":"\u003cscript type\u003d\u0027text/x-mathjax-config\u0027\u003eMathJax.Hub.Config({tex2jax: { inlineMath: [[\u0027$\u0027,\u0027$\u0027],[\u0027\\[\u0027,\u0027\\]\u0027]] } }); \u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027 src\u003d\u0027https://cdn.mathjax.org/mathjax/latest/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\u0027\u003e\u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027\u003esetTimeout(function(){MathJax.Hub.Queue([\u0027Typeset\u0027, MathJax.Hub, \u0027left_view\u0027]);}, 2000);\u003c/script\u003e\n\u003cdiv class\u003d\"panel_content\"\u003e\n\u003cp\u003e\n A题说到小喵由于贪玩,有几天没有刷题。那么它那几天在干什么呢?他在参加聚会!这天,他又去参加聚会了。在KTV里,小喵和其它几只喵坐成一排。一只花喵开口了:“我是来自广东省的喵。”另一只灰喵两眼放光:“好巧啊,咱们可是老乡!”话题便开始有了老乡会的味道,这几只喵来自各种各样的省份,有江苏的,有浙江的…小喵感到十分兴奋。\u003c/p\u003e\n\u003cp\u003e现在小喵想知道坐的最近的两只老乡喵之间的距离,给出一串小写字符,每个字符代表一个省份,每邻近的两个字符之间的距离为1,聪明的你一定能解决如此简单的问题吧!\u003c/p\u003e\n\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"第一行是一个整数T(1 \u003c\u003d T \u003c\u003d 50),代表测试数据的组数。\n\u003cbr\u003e \n\u003cbr\u003e每个测试数据仅有一行长度为N(1\u003c\u003dN\u003c\u003d1000)的字符串,第i个字符代表第i只喵的故乡,字符串仅包含小写字母。"}},{"title":"Output","value":{"format":"HTML","content":"对于每组测试样例,你应当输出 \" \n\u003cb\u003eCase #x: y\u003c/b\u003e\", x代表从1开始的测试组编号,y代表答案。如果每只喵都来自于不同的省份,输出-1。"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e2\nabcecba\nabc\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003eCase #1: 2\nCase #2: -1\u003c/pre\u003e"}},{"title":"Hint","value":{"format":"HTML","content":""}}]}