Номера телефонов 1

def check_tele(stra: str):
    stra = ''.join(stra.split())
    c1 = stra.startswith('+7') or stra.startswith('8')
    c2 = all(stra.split('-'))
    c3 = (stra.count('(') == 1 and stra.count(')') == 1 and
          stra.find('(') < stra.find(')'))
    c4 = stra.count('(') == 0 and stra.count(')') == 0
    if c1 and c2 and (c3 or c4):
        for c in '()-':
            stra = stra.replace(c, '')
        if stra.startswith('8'):
            stra = '+7' + stra[1:]
        if stra[1:].isdigit() and len(stra) == 12:
            return stra
        else:
            return 'error'
    else:
        return 'error'
 
 
if __name__ == '__main__':
    print(check_tele(input()))

phone_number = input()
phone_number = phone_number.replace(" ", "").replace("\t", "")
 
if "(" in phone_number and ")" in phone_number:
    start_index = phone_number.index("(")
    end_index = phone_number.index(")")
    phone_number = phone_number[:start_index] + phone_number[start_index + 1:end_index] + phone_number[end_index + 1:]
 
if "--" not in phone_number and "-" in phone_number:
    phone_number = phone_number[0] + phone_number[1:-1].replace("-", "") + phone_number[-1]
if phone_number.startswith("+7"):
    phone_number = "+7" + phone_number[2:]
elif phone_number.startswith("8"):
    phone_number = "+7" + phone_number[1:]
 
if len(phone_number[1:]) == 11 and phone_number[1:].isdigit():
    print(phone_number)
else:
    print("error")

def check_tel(s):
    s = s.strip()
    s = ''.join(s.split())
    if s.startswith('+7'):
        s = s[2:]
    elif s.startswith('8'):
        s = s[1:]
    else:
        return 'error'
    if s.endswith('-') or '--' in s:
        return 'error'
    s = ''.join(s.split('-'))
    ss = ''.join(x for x in s if x in '()')
    if not ss in ['', '()']:
        return 'error'
    s = s.replace('(', '')
    s = s.replace(')', '')
    if not s.isdigit() or len(s) != 10:
        return 'error'
    return '+7' + s
 
s = input('Введите номер телефона->')
print(check_tel(s))