#4,#7错误，求指点，必关

#include <stdio.h>
int main() {
    char x[14];
        scanf("%13s", x);
        x[13] = '\0';
        int n = 0;
        //遍历x,如果是数字，就累加到count
        int count = 0;
        int value = 1;
        //累加计算
        for (int i = 0; i < 12; i++) {
            if (x[i] >= '0' && x[i] <= '9') {
                count += ((x[i] - '0') * value);
                value++;
            }
        }
        //count mod 11
        int end = count % 11;
        if (end == (x[12] - '0')) {
            printf("Right\n");
        }
        else {
            if (end == 10) {
                x[12] = 'X';
                // == 10
            }
            else {
                x[12] = end + '0';
            }
            printf("%s\n", x);
        }
    return 0;
}