Unable to perform this programme plz help me
package com.codegym.task.task01.task0103;
/*
My young friend
*/
public class Solution {
public static void main(String[] args) {
int a=3126;
int b=8;
int c=a-b;
String d = "my friend's birth year is" + "c";
System.out.println("d");
}
}