{"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":"\u003cimg src\u003d\"https://s3.ax1x.com/2020/11/11/Bvy4f0.png\" alt\u003d\"Bvy4f0.png\" border\u003d\"0\" /\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e2\naaaaa\naa\nabababab\naba\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e13\n19\n\n \n \u003ci style\u003d\"font-size:1px\"\u003e \u003c/i\u003e\u003c/pre\u003e"}},{"title":"Hint","value":{"format":"HTML","content":"\u003cpre\u003e\ncase 2: \nSuffix(S2,1) \u003d \"aba\",\nSuffix(S2,2) \u003d \"ba\",\nSuffix(S2,3) \u003d \"a\".\nN1 \u003d 3,\nN2 \u003d 3,\nN3 \u003d 4.\nL1 \u003d 3,\nL2 \u003d 2,\nL3 \u003d 1.\nans \u003d (3*3+3*2+4*1)%1000000007.\n\n \n \u003c/pre\u003e"}}]}