is it a cat? time limit per test 2 seconds memory limit per test 256 megabytes  you were walking down the street and heard a sound. the sound was described by the string s consisting of lowercase and uppercase latin characters. now you want to find out if the sound was a cat meowing. for the sound to be a meowing, the string can only contain the letters 'm', 'e', 'o' and 'w', in either uppercase or lowercase. also: string must start with non-empty sequence consisting only of characters 'm' o