def to_string(x):  # [too-many-return-statements]
    # max of 6 by default, can be configured
    if x == 1:
        return 'This is one.'
    if x == 2:
        return 'This is two.'
    if x == 3:
        return 'This is three.'
    if x == 4:
        return 'This is four.'
    if x == 5:
        return 'This is five.'
    if x == 6:
        return 'This is six.'
    if x == 7:
        return 'This is seven.'
