import cs1.Keyboard;

public class ex72
{
	//=========================================
	//method of replace
	public static String replace(String s,char c)
	{
		char str='*';
		String last="";
		for(int n=0;n<s.length();n++)
		{
			char test=s.charAt(n);
			if (test==c)
				last+=str;
			else
				last+=test;
		}
		return last;
	}
	//done: method of replace
	//===========================================
	//test in main
	public static void main(String args[])
	{
		System.out.println(replace("example",'a'));
	}
}