HateLace/app/src/main/java/hatelace/Program.java

package hatelace;

import java.util.ArrayList;

// This is simply an intermediate class to comply with the specified API requirements.
public abstract class Program extends ArrayList<Instruction> {
    public String toString() {
        StringBuilder builder = new StringBuilder();
        for (Instruction instruction : this) {
            builder.append(instruction.toString());
            builder.append("\n");
        }
        return builder.toString();
    }
}