#include <stdio.h>
 
void replace(char i, char a, char b) {
    while (i!= '\0') {  // 終端文字 '\0' に達するまでループ
        if (i == a) {
            i = b;  // '1' を 'I' に置き換える
        }
        i++;  // 次の文字へポインタを進める
    }
}
 
int main() {
    char s[100];  // 最大100文字の入力
    scanf("%s", s);  // 文字列を入力
 
    replace(s, '1', 'I');  // 全ての '1' を 'I' に置き換える
 
    printf("変換後の文字列: %s\n", s);
 
    return 0;
}
 

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