#include <stdio.h>

typedef char Sign[2][2];

void printSign(const Sign *const sign) {
  printf("%c%c\n", (*sign)[0][0], (*sign)[0][1]);
  printf("%c%c\n", (*sign)[1][0], (*sign)[1][1]);
}

int main(void) {
  const Sign signA = { {'x', 'o'}, {'o', 'x'} };
  const Sign signB = { {'o', 'x'}, {'x', 'o'} };

  const Sign *signPtr = &signA;
  printSign(signPtr);

  printf("\n");

  signPtr = &signB;
  printSign(signPtr);
}