alias validate {
  var %i = 1
  var %chr_err = 0
  while (%i <= $len($1)) {
    var %check = $asc($mid($1,%i,1))
    if (((%check >= 48) && (%check <= 57)) || ((%check >= 97) && (%check <= 122)) || ((%check >= 65) && (%check <= 90))) { }
    else inc %chr_err 
    inc %i 
  }
  if (%chr_err >= 1) { echo -a Invalid Character ; %chr_err errors }
  else { echo -a Valid }
}