H stands for Hold'em

O for Omaha Eight or Better (i.e. Omaha hi-low (split-8 or better) , or simply Omaha/8 )

, 5️⃣ or simply ) S for 7 Card Stud

E for 7 Card Stud Eight or Better

This form of poker is considered 5️⃣ harder and not for beginners since it requires players to be skilled at many different forms of poker to succeed.[1] 5️⃣ It is also commonly played at casino tables. Players must have a great deal of concentration as well to not 5️⃣ confuse which game is being played.