出现最多的字符 ### 题目描述 **本题为填空题，只需要算出结果后，在代码中使用输出语句将所填结果输出即可。** 下面的矩阵中包含 $ABCDEF$ 六种字符，请问出现最多的字符出现了几次？ ```text FFEEFEAAECFFBDBFBCDA DACDEEDCCFFAFADEFBBA FDCDDCDBFEFCEDDBFDBE EFCAAEECEECDCDECADDC DFAEACECFEADCBFECADF DFBAAADCFAFFCEADFDDA EAFAFFDEFECEDEEEDFBD BFDDFFBCFACECEDCAFAF EFAFCDBDCCBCCEADADAE BAFBACACBFCBABFDAFBE FCFDCFBCEDCEAFBCDBDD BDEFCAAAACCFFCBBAAEE CFEFCFDEEDCACDACECFF BAAAFACDBFFAEFFCCCDB FADDDBEBCBEEDDECFAFF CDEAFBCBBCBAEDFDBEBB BBABBFDECBCEFAABCBCF FBDBACCFFABEAEBEACBB DCBCCFADDCACFDEDECCC BFAFCBFECAACAFBCFBAF ```