Print A Formal Name in en_US

def pname(name: str) -> str:
    name = name .strip().lower()
    while '  ' in name : name = name .replace('  ', ' ')
    name = name .title().split(' ')
    length = len(name)
    if length == 1: return (name[0])
    elif length == 2: return (name[1] + ', ' + name[0])
    elif length == 3: return (name[2] + ', ' + name[0] + ' ' + name[1][0] + '.')
    elif length >= 4: return ' '.join((name[-1] + ',', name[0], ''.join(name[x][0] + '.' for x in range(1, length - 1))))

print(pname(input()))