Store the unique characters corresponding to word and number
k = [ " z " , " w " , " u " , " x " , " g " , " h " , " o " , " f " , " v " , " i " ] NEW_LINE l = [ " zero " , " two " , " four " , " six " , " eight " , " three " , " one " , " five " , " seven " , " nine " ] NEW_LINE c = [ 0 , 2 , 4 , 6 , 8 , 3 , 1 , 5 , 7 , 9 ] NEW_LINE