Prints super sequence of a [ 0. . m - 1 ] and b [ 0. . n - 1 ]
function printSuperSeq ( a , b ) { let m = a . length , n = b . length ; let dp = new Array ( m + 1 ) ; for ( let i = 0 ; i < m + 1 ; i ++ ) dp [ i ] = new Array ( n + 1 ) ;