The document contains 3 lists of 10 letter combinations each. The lists follow a pattern where the first 2 letters are the same and the 3rd letter varies down the list, with the last 7 letters mixed in different orders. This creates 30 unique 10-letter combinations across the 3 lists that follow a structured pattern with the letters.

1. -ab -ad -ag -am -an -ap -at -ar -ed -et
Cab Bad Bag Bam Ban Cap Bat Bar Bed Bet
Dab Dad Gag Cam Can Gap Cat Car Fed Get
Gab Had Hag Dam Dan Lap Fat Dar Led Jet
Jab Lad Lag Ham Gan Map Hat Gar Red Let
Lab Mad Nag Jam Fan Nap Mat Har Wed Met
Nab Pad Rag Lam Han Rap Pat Mar Med Net
Tab Sad Sag Pam Man Sap Rat Nar Hed Pet
Bab gad Tag Ram Pan Tap Sat Par Ped Set
Fab Cad Wag Yam Ran Yap Lat Tar Ted Vet
Hab Fad Mag Gam San Hap Dat Far Zed Wet
Pab Tad Dag Nam Tan Zap Gat Sar Ned Zet