这个是什么意思，左边字母也不懂

#include <stdio.h>
int main()
{
int i,j;
int map[19][18]=
{{'a',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{'c',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{'e',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{'g',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{'i',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',10,6,6,2,6,3,6,6,6,6,6,4,6,5,6,6,10},
{'k',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{'m',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{'o',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{'q',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0},
{'b',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{'b',0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0}};

初始化了一个命名为map的二维数组，19行18列，左边字母是填充到第一列的内容