#include <stdio.h>

int main(int argc, char** argv) {
 int i = 0;
 char val[2][3][2] = {{{'0','1'},{'2','3'},{'4','5'}}, {{'6','7'},{'8','9'},{'a','b'}}};
 for(i=0;i<sizeof(val);++i) {
  printf("%c,", ((const char*)val)[i]); 
 }
 return 0;
}

0,1,2,3,4,5,6,7,8,9,a,b,