import java.util.HashSet;
import java.util.Scanner;
public class Main {
	public static void main(String[] a) {
		try (Scanner in = new Scanner(System.in)) {
			while (in.hasNext()) {
				String line = in.nextLine().replace("[", "").replace(",", "").replace("]", "");
				System.out.println(line + " -> " + parseLine(line));
			}
		}
	}
	public static boolean parseLine(String line) {
		boolean flag = false;
		try (Scanner in = new Scanner(line)) {
			HashSet<Integer> set = new HashSet<>();
			while (in.hasNext()) {
				int x = in.nextInt();
				if (x==0 || !set.add((x<0)?(-x):(x))) {
					flag = true;
					break;
				}
			}
		}
		return flag;
	}
}

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WzEsIDIsIDNdClstNSwgLTMsIC0xLCAyLCA0LCA2XQpbXQpbLTEsIDFdClstOTczNjQsIC03MTU2MSwgLTY5MzM2LCAxOTY3NSwgNzE1NjEsIDk3ODYzXSAKWy01Mzk3NCwgLTM5MTQwLCAtMzY1NjEsIC0yMzkzNSwgLTE1NjgwLCAwXQo=

[1, 2, 3]
[-5, -3, -1, 2, 4, 6]
[]
[-1, 1]
[-97364, -71561, -69336, 19675, 71561, 97863] 
[-53974, -39140, -36561, -23935, -15680, 0]