To figure out the 8th letter of the alphabet, simply start at the 10th letter, J, and work backward two letters. Two letters before J is H, so H is the 8th letter of the alphabet. To figure out which letter of the alphabet S is, remember that the letter T is the 20th letter of the alphabet. Since S is one letter before T, S must be the 19th letter of the alphabet.
Since the EJOTY mnemonic covers letters only 5 letters apart, you'll never have to move more than 2 letters ahead or back to determine the needed letter or position.
Simply link each letter image that you learned from AlphabetSystems, with the appropriate number image from your established MajorSystem or DominicSystem links.
If you learned the Letter Shape alphabet system, and the MajorSystem for numbers, you would link "geometric compass" (A) to "tie" (1), and so on, all the way to "folding ruler" (Z) to "notch" (26).
If you learned the Letter Sound alphabet system, and the DominicSystem for numbers, you would link "ape" (A) to your image for "OA" (1), and continue through to "zebra" (Z), which would be linked to your image for "BS" (26).