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import java.util.Scanner;

public class ahmed {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
//		int a = in.nextInt();
//		int b = in.nextInt();
//
//		int ans = Math.abs(a - b);
//		if (ans == 0) {
//			System.out.println(0);
//		} else {
//			if (ans % 3 == 0) {
//				System.out.println(1);
//			} else {
//				System.out.println(0);
//			}
//		}
		
		String x=in.next();
		String xa=in.next();
		char ans[]=x.toCharArray();
		int hh=0;
		for (int i = 0; i < xa.length(); i++) {
			int h=xa.charAt(i)-48;
			hh+=h;
			
			System.out.println(h);
			if((int)ans[h-1]>90){
				int tt=ans[h-1]-32;
				ans[h-1]=(char)tt;
			}
		}
		if((int)ans[hh-1]>90){
			int tt=ans[hh-1]-32;
			ans[hh-1]=(char)tt;
		}
		System.out.println(new String(ans));
		
		

	}

}
