Function that returns if the string x is a pangram
function Pangram ( x ) { let mp = new Map ( ) ; let n = x . length ; for ( let i = 0 ; i < n ; i ++ ) { if ( mp . has ( x [ i ] ) ) { mp . set ( x [ i ] , mp . get ( x [ i ] ) + 1 ) } else { mp . set ( x [ i ] , 1 ) } } if ( mp . size == 26 ) return true ; else return false ; }