{"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":"\u003cp\u003e大魔法师烤乐滋擅长对物体进行变换,变换的规则如下:\u003c/p\u003e\n\n\u003cp\u003e若一个咒语以a开头b结尾,则烤乐滋可以把任何以a开头的物品变成以b开头的物品。\u003c/p\u003e\n\n\u003cp\u003e现在烤乐滋想养小仓鼠了,可是他没有小仓鼠(mouse),手中只有一只皮球(ball)。\u003c/p\u003e\n\n\u003cp\u003e烤乐滋掏出了他的大魔法书,上面记录了他所拥有的全部咒语,请问他能否拥有一只可爱的小仓鼠呢?\u003c/p\u003e\n\n"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003e测试数据有多组。每组有多行,每行一个单词,仅包括小写字母,是烤乐滋所会的所有咒语.数字0表示一组咒语全部输入结束.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"如果烤乐滋可以将皮球变成仓鼠,就输出\"Yes.\",否则就输出\"No.\"(不要忽略了句号) \n\u003cbr\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003eso\nsoon\nriver\ngoes\nthem\ngot\nmoon\nbegin\nbig\n0\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003eYes.\n\n\n \n \u003ci style\u003d\"font-size:1px\"\u003e \u003c/i\u003e\n烤乐滋可以这样念咒语:\"big-got-them\".\u003c/pre\u003e"}}]}