def rasu(a):
    if a < 0:
        return "ошибка"
    if a < 10:
        return a
    else:
        return rasu(a // 10) + (a % 10)


print(rasu())




1ab53cf84899955506ca38b40c046d23ebf86622
<mask token>

def rasu(a):
    if a < 0:
        return 'ошибка'
    if a < 10:
        return a
    else:
        return rasu(a // 10) + a % 10


<mask token>

def rasu(a):
    if a < 0:
        return 'ошибка'
    if a < 10:
        return a
    else:
        return rasu(a // 10) + a % 10


print(rasu())

def rasu(a):
    if a < 0:
        return "ошибка"
    if a < 10:
        return a
    else:
        return rasu(a // 10) + (a % 10)


print(rasu())



