How to read the chart
s = suited (same suit). o = offsuit (different suits).
Example: AKs = Ace-King suited. AKo = Ace-King offsuit.77+ = every pocket pair from 77 up (77, 88, 99, TT, JJ, QQ, KK, AA).ATs+ = every suited Ace-Ten or higher (ATs, AJs, AQs, AKs).