6_26

ag=True
# while tag:
#     print('leve1')
#     choice=input("level1>>: ").strip()
#     if choice == 'quit':break
#     if choice == 'quit_all': tag = False
#     while tag:
#         print('level2')
#         choice = input("level2>>: ").strip()
#         if choice == 'quit': break
#         if choice == 'quit_all': tag = False
#         while tag:
#             print('level3')
#             choice = input("level3>: ").strip()
#             if choice == 'quit': break
#             if choice == 'quit_all': tag = False