#include<iostream>

using namespace std;

int main()
{
	char g[300], a, b;
	int i=0,n;
	cout<<"Enter no of char: ";
	cin>>n;
	cout<<"Enter a string to replace multiple entries with: ";
	cin>>g;
	cout<<g;
	cout<<"Enter A char: ";
	cin>>a;
	cout<<"Enter B char: ";
	cin>>b;
	
	for(i=0;i<n;i++)
	{	
		if(g[i]==a)
		{
			g[i]=b;
			continue;
		}
		
		if(g[i]==b)
		{
			g[i]=a;
			continue;
		}
		
	}
	
	cout<<"Resultant string: "<<g;
	
	return 0;
}