Problem Statement

Write a program that accepts a name as input and outputs the lyrics to the Shirley Ellis song "The Name Game".

The regular verse Unless your name begins with a vowel (A, E, I, O, U), 'B', 'F' or 'M' you don't have to care about special rules. The verse for the name 'Gary' would be like this: At the end of every line, the name gets repeated without the first letter: Gary becomes ary If we take (X) as the full name (Gary) and (Y) as the name without the first letter (ary) the verse would look like this: Vowel as first letter of the name If you have a vowel as the first letter of your name (e.g. Earl) you do not truncate the name. The verse looks like this: 'B', 'F' or 'M' as first letter of the name In case of a 'B', an 'F' or an 'M' (e.g. Billy, Felix, Mary) there is a special rule. The line which would 'rebuild' the name (e.g. bo-billy) is sung without the first letter of the name. The verse for the name Billy looks like this: For the name 'Felix', this would be right:

Let's start with the solution:

sub mangle ($name, $initial) {
    my $fl = $name.lc.substr(0,1);
    $fl ~~ /<[aeiou]>/
    ?? $initial~$name.lc
    !! $fl eq $initial
    ?? $name.substr(1)
    !! $initial~$name.substr(1)
}

sub name-game (Str $name) {
    qq:to/NAME-GAME/;
    $name, $name, bo-{ mangle $name, 'b' }
    Banana-fana fo-{ mangle $name, 'f' }
    Fee-fi-mo-{ mangle $name, 'm' }
    $name!
    NAME-GAME
}

say .&name-game for