Enchant code : English and Numbers

summon Skeleton ~ ~ ~ {CustomName:"2F3", Attributes:[{Name:generic.maxHealth, Base:50}], Equipment:[{id:"minecraft:bow", tag:{ench:[{id:"minecraft:punch",lvl:10},
{id:"minecraft:flame", lvl:1}]}},{},{},{},{}],Riding:{id:Silverfish, CustomName:"2F3", Attributes:[{Name:generic.maxHealth, Base:100}] }}

It doesn't work. (textures show enchanted bow but not effective)

summon Skeleton ~ ~ ~ {CustomName:"2F3", Attributes:[{Name:generic.maxHealth, Base:50}], Equipment:[{id:"minecraft:bow", tag:{ench:[{id:49,lvl:10},
{id:50, lvl:1}]}},{},{},{},{}],Riding:{id:Silverfish, CustomName:"2F3", Attributes:[{Name:generic.maxHealth, Base:100}] }}

It works.

But I cannot use number code in 1.8 release!