X, Y = map(int, input().split())

def p(a, b):
    print(a + '' + b)

p(X * Y, X * Y)

for x in range(1, X + 1):
    p(x, ((x + 1) if x != X else 1))
    fr = (Y - 1) * x + X
    p(x, fr)
    for d in range(Y - 2):
        p(fr + d, fr + d + 1)