using System;

namespace Subleq {
    class Program {
        static void Main(string[] args) {
            int[] mem = {
                15, 17, -1, 17, -1, -1, 16, 1, -1, 16,
                3, -1, 15, 15, 0, 0, -1, 72, 101, 108,
                108, 111, 44, 32, 119, 111, 114, 108, 100, 33,
                10, 0,
            };

            int instructionPointer = 0;

            do {
                int a = mem[instructionPointer];
                int b = mem[instructionPointer + 1];

                if (a == -1) {
                    mem[b] = Console.Read();
                }
                else if (b == -1) {
                    Console.Write((char)mem[a]);
                }
                else {
                    mem[b] -= mem[a];
                    if (mem[b] < 1) {
                        instructionPointer = mem[instructionPointer + 2];
                        continue;
                    }
                }

                instructionPointer += 3;
            } while (instructionPointer >= 0);
        }
    }
}