# Note: triple quotes around versions here disables them.
# Remove quotes to test a specific version in this file.


# Version 1
"""
while True:
    reply = input('Enter text:')
    if reply == 'stop': break
    print(reply.upper())
"""


# Sidebar alternative
"""
while (reply := input('Enter text:')) != 'stop':
    print(reply.upper())
"""


# Version 2
"""
while True:
    reply = input('Enter text:')
    if reply == 'stop': break
    print(int(reply) ** 2)
print('Bye')
"""


# Version 3
"""
while True:
    reply = input('Enter text:')
    if reply == 'stop':
        break
    elif not reply.isdigit():
        print('Bad!' * 8)
    else:
        print(int(reply) ** 2)
print('Bye')
"""


# Version 4
"""
while True:
    reply = input('Enter text:')
    if reply == 'stop': break
    try:
        num = int(reply)
    except:
        print('Bad!' * 8)
    else:
        print(num ** 2)
print('Bye')
"""


# Version 5
"""
while True:
    reply = input('Enter text:')
    if reply == 'stop': break
    try:
        print(int(reply) ** 2)
    except:
        print('Bad!' * 8)
print('Bye')
"""


# Version 6
"""
while True:
    reply = input('Enter text:')
    if reply == 'stop': break
    try:
        print(float(reply) ** 2)
    except:
        print('Bad!' * 8)
print('Bye')
"""

# Version 7

while True:
    reply = input('Enter text:')
    if reply == 'stop':
        break
    elif not reply.isdigit():
        print('Bad!' * 8)
    else:
        num = int(reply)
        if num < 20:
            print('low')
        else:
            print(num ** 2)
print('Bye')