08. Secret Door's Lock

# 08. Secret Door's Lock

a = int(input())
b = int(input())
c = int(input())
for i in range(1, a+1):
    if i % 2 == 0:
        for j in range(2, b+1):
            if j == 2 or j == 3 or j == 5 or j == 7:
                for k in range(1, c+1):
                    if k % 2 == 0:
                        print(f'{i} {j} {k}')