/*Demonstrasi karakter dan string */
#include <stdio.h>
#include <iostream>
#include <string.h>
using namespace std;
string lowerCase(string str){
for(int i = 0; i < str.length();i++)
str[i] = towlower(str[i]);
return str;
}
int main(){
string str;
cin >> str;
while(str != "STOP"){
cout << lowerCase(str) << '\n';
cin >> str;
}
}
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