The contents of the first card are:
A B C D E F G
1 +E#M jqt5 4HZx 9Z6E iswd aXwn yiEh
2 pjE# 9:MU S+xD D@94 SUy: t?y= UAST
3 v@zv ExN% K?fR NAvK xc!C 9tjY Y?n7
4 ZzZy vuMH %#4R ChnM sh@t cuwC PJGy
5 Lbpk j@n5 WFk2 RGVi q2RE 2zZW ihyZ
6 avVm :9@B NAm3 8qZp L:6t NuiD xLky
7 tRs9 sUSV Fw9r H=EG VjMA +BYk 4xL3
8 V9Zk XzTZ zZ=K @S:X THuj P+Me vrRh
9 rfja yshs i4gf iX:t 5oKP WKkD vvJm
10 @dU6 !hNU k:3: Dt8D X!U7 48Sa hG:m

I’m testing your 3.0.1 version. I find that I’m getting different results from your code and grc’s page, even though I’m using the same sequence key. Could that have to do with the passcode character set? Do the default alphabets not match?

Example using Groovy with your latest code:

groovy:000> skey = PPPengine.findSequenceKey(‘nowisthetime’)
===> 77f39930b9efa833c7e8e42f32f0daf73e8db1bf9cec387699b155ee5675ad4c
groovy:000> e = new PPPengine(skey)
===> PPPengine@1b03c1a
groovy:000> e.makePasscode()
===> 5e3m
groovy:000> e.advanceOffset()
===> null
groovy:000> e.getOffset()
===> 1
groovy:000> e.makePasscode()
===> anbo
groovy:000> e.advanceOffset()
===> null
groovy:000> e.makePasscode()
===> B9Uv

Using the same sequence key at https://www.grc.com/ppp.htm yields the first three passcodes of:
+E#M jqt5 4HZx

Why the difference? It seems critical that the passcodes match from both sources.

Thanks for the code!