#include <stdio.h>

void fixMistake(char s[]) {
    int i;
    for (i = 0; s[i] != '\0'; i++) {
        if (s[i] == '1') {
            s[i] = 'I'; 
        }
    }
}

int main(void) {
    
    char str1[] = "1NFORMAT1ON";
    char str2[] = "1iI";

    printf("変換前: %s\n", str1);
    fixMistake(str1);
    printf("変換後: %s\n\n", str1); 

    printf("変換前: %s\n", str2);
    fixMistake(str2);
    printf("変換後: %s\n", str2); 

    return 0;
}