#include <stdio.h>
#include <stdlib.h>
#define N 20
int main(int argc, char* argv[])
{
char str[256] = "1100000011111110000111111000001111110001011111111111\0";
printf("%s\n",str);
for (int i = 0; str[i] != '\0'; i++)
{
int k = i;
while (str[i] == str[i+1]) i++;
if ((abs(k-i) % 2))
{
for (int t = k; t <= i; t++)
printf("%c", str[t]);
printf("\n");
}
}
return 0;
}