Something

#include <stdio.h>

int check_baby (char*, char*, char*);
int main() {
    
    FILE *fp;
    fp = fopen("s1.in", "r");
    
    char mother[11], father[11], baby[6];
    int num_babies = 0;
    
    fscanf(fp, "%s", mother);
    fscanf(fp, "%s", father);
    fscanf(fp, "%d", &num_babies);
    
    int x;
    for (x = 1; x <= num_babies; x++) {
        fscanf(fp, "%s", baby);
       
       
        if (check_baby(mother, father, baby))
           printf("Possible baby.\n");
        else
           printf("Not their baby!\n");
  
    }
    
    fclose(fp);
    
    printf("\n\n");
    system("pause");
    return 0;
}

int check_baby(char *mother, char *father, char *baby) {
    
    int correct = 0;
    
    /* inherited from */
    char *infr;
    
    int x;
    for (x = 0; x < 5; x++) {
          if (mother[x*2] + mother[x*2+1] < father[x*2] + father[x*2+1])
             infr = &mother[x*2];
          else
             infr = &father[x*2];
          
          if (infr[0] == baby[x] || infr[1] == baby[x])
             correct++;
    }
    
    return (correct == 5 ? 1 : 0);
}