{"trustable":true,"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":"\u003cdiv class\u003d\"panel_content\"\u003e\u0026nbsp;\u0026nbsp;One day, Resty gets a very interesting puzzle. Eve said that she will make a cake for Resty if he solved this puzzle, so Resty asks you to help him to solve the puzzle as soon as possible. \u003cbr\u003e\u0026nbsp;\u0026nbsp;As the figure, the puzzle is a rectangle divided into 4 * 6 \u003d 24 squares. Each cell has a color of white / black/ grey. There are exactly 8 cells of each color. Our purpose is to make the middle 8 cells(which are not on the edge) have the same color by minimal steps. \u003cbr\u003e\u003cbr\u003eEach step, you could choose a row or a column to shift it for 1 bit. As following:\u003cbr\u003e\u003ccenter\u003e\u003cimg style\u003d\"max-width:100%;\" src\u003d\"CDN_BASE_URL/698b9856aa87ecec6c14fc25f2ee5e34?v\u003d1714390023\"\u003e\u003c/center\u003e\u003cbr\u003eNow, given the puzzle, you should help Resty find the minimal steps he must use to solve it.\u003cbr\u003e\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"The first line is a number T, the number of test case.\u003cbr\u003eEach case contains 4 lines, each line contains a 6-length string, describe a puzzle. B for black color, W for white and G for grey.\u003cbr\u003e"}},{"title":"Output","value":{"format":"HTML","content":"For each test, output on line in the Format “Case ID: ANS”, ANS should be the minimal number of steps to solve the puzzle. "}},{"title":"Sample","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e3\r\nGWGGWW\r\nBBBBBW\r\nGBBBGW\r\nWGGGWW\r\nGWGGWW\r\nBWBBBB\r\nGBBBGW\r\nWGGGWW\r\nWWWWWW\r\nBGGGGB\r\nWGGGGW\r\nBBBBBB\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eCase 1: 2\r\nCase 2: 3\r\nCase 3: 0\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}