from enum import Enum


class ShipMode(Enum):
    PUT = 'PUT'
    SHOOT = 'SHOOT'
    UNKNOWN = 'UNKNOWN'

    @staticmethod
    def from_string(raw_value):
        if raw_value:
            value = raw_value.upper()
            if value in ShipMode.__members__:
                return ShipMode[value]
        return ShipMode.UNKNOWN