n,i,j = map(int,input().split())

for x in range(1,n+1):
    if x == n:
        print(f'({i},{x})')
    else:
        print(f'({i},{x})',end=' ')

for y in range(1,n+1):
    if y == n:
        print(f'({y},{j})')
    else:
        print(f'({y},{j})',end=' ')

for t in range(1,n+1):
    if (t+j-i) <= n:
        if t+j-i == n:
            print(f'({t},{t+j-i})')
        else:
            print(f'({t},{t+j-i})',end=' ')

for z in range(1,n+1):
    if (i+j-z) <= n:
        if z == n:
            print(f'({i+j-z},{z})')
        else:
            print(f'({i+j-z},{z})',end=' ')