homework_30.11.2021

30.11.2021
#Задание 1
s = '123' * 40
while '12' in s or '333' in s:
    if '12' in s:
        s = s.replace('12', '3', 1)
    elif '333' in s:
        s = s.replace('333', '3', 1)
print(s)
#Задание 2
s = '1122' * 71
while '12' in s or '222' in s:
    if '12' in s:
        s = s.replace('12', '2', 1)
    elif '222' in s:
        s = s.replace('222', '2', 1)
print(s)
#Задание 3
s = '3' * 90 + '1'
while '331' in s or '166' in s:
    if '331' in s:
        s = s.replace('331', '16', 1)
    elif '166' in s:
        s = s.replace('166', '31', 1)
print(s)
#Задание 4
s = '1' + '9' * 100
while '19' in s or '299' in s or '3999' in s:
    if '19' in s:
        s = s.replace('19', '2', 1)
    if '299' in s:
        s = s.replace('299', '3', 1)
    if '3999' in s:
        s = s.replace('3999', '1', 1)
print(s)