#include <stdio.h>
#include <stdbool.h>



bool checkDigits(int chicken, int rabbit) {
    bool digits[6] = {0};
    int num = chicken*1000 + rabbit;
    while (num > 0) {
        if (num % 10 > 6 || digits[num % 10]) {
            return false;
        }
        else {
            digits[num % 10] = true;
            num /= 10;
        }
    }
    return true;
}

int main() {
    int count = 50;
    for (count = 50; count < 250; count++) {
        if (checkDigits(count * 2, count * 4)) {
            printf("There are %d chickens and rabbits. %d chicken legs, %d rabbit legs.", count, count*2, count*4);
        }
    }
    return 0;
}