import sys
input = lambda: sys.stdin.readline().rstrip()

def main():
    # 入力
    X, Y = map(int, input().split())
    # 計算・出力
    ans = [f'{X*Y} {X*Y}']
    for i in range(X-1):
        ans.append(f'{i+1} {i+2}')
    ans.append(f'{X} 1')
    for i in range(X, X*Y):
        ans.append(f'{i+1} {i+1-X}')
    print('\n'.join(ans))

if __name__ == "__main__":
    main()