#include <iostream>
#include <string.h>
#include <bits/stdc++.h>
using namespace std;
string replace(string s, char c1, char c2){
int l = s.length();
for(int i = 0; i < l; i++){
if(s[i] == c2)
s[i] = c1;
}
return s;
}
int main(){
string str = "OcianLabz";
cout<<"Input String : "<<str<<endl;
char c1 = 'e', c2 = 'i';
cout<<"After Replace string : "<<replace(str,c1,c2);
return 0;
}