I have purposely removed all the text boxes in an effort to reduce lag, I've also given 100 seconds instead of the normal 90 to try and help. There's 187 different two-letter combinations needed to get them all!
Who else did consonant-vowel pairs alphabetically (for example ba, be, bu, bi, bo, ca, etc) and came back for consonant-consonant (for example cr, cl, ch, sh, sc, sl, etc)?
well done!