16
0 Alchemy
1 Animal_Empathy
2 Bluff
3 Concentration
4 Diplomacy
5 Disable_Device
6 Hide
7 Intimidate
8 Knowledge_Arcana
9 Move_Silently
10 Open_Lock
11 Pick_Pocket
12 Search
13 Spellcraft
14 Use_Magic_Device
15 Wilderness_Lore