docs: function generate (orgID, loanNumber) {
    //strip non-numeric or letters
    loanNumber = loanNumber.replace(/\D/g,"");
    orgID = orgID.replace(/\D/g,"");
  
    //string letters
    var loanNum = loanNumber.replace(/[a-z]/gi,"");
    orgID = orgID.replace(/[a-z]/gi,"");
  
    if (orgID.toString().length != 7 ){
      throw new Error("org ID is not 7 digits")
      //return null;
    } else if (loanNum.toString().length > 10){
      throw new Error("[error]: loan number is longer than 10 digits");
      //return null;
    } else if (loanNum.toString().length < 10){
      while (loanNum.toString().length < 10){
        loanNum = "0" + loanNum;
      }
      //console.log("orgID: " + orgID + "\tloanNum: " + loanNum);
    }
    var temp = orgID.toString() + loanNum.toString();
    var sum = 0;
    for(var i = 0; i < temp.length; i++){
      if(i % 2 == 0){
        var x2 = parseInt(temp[i])*2;
        if(x2 > 9){
          sum += 1 + x2 % 10;
          //console.log(1 + x2 % 10);
        }else{
          sum += x2;
          //console.log(x2);
        }
      }else{
        sum += parseInt(temp[i]);
        //console.log(temp[i]);
      }
    }
    //console.log("sum" + sum);
    var digit = Math.ceil(sum/10)*10 - sum
    //console.log(Math.ceil(sum/10)*10);
    var output = {
      "orgID": orgID,
      "loanNum": loanNumber,
      "digit": digit,
      "min": orgID + loanNum + digit
    }
    return output;
  
  }