Have you at least had a go first? Come on!!

Answers:

Tail 1 and Head 10
Tail 3 and Head 11
Tail 2 and Head 6
Tail 4 and Head 1
Tail 5 and Head 8
Tail 6 and Head 2
Tail 7 and Head 9
Tail 8 and Head 3
Tail 9 and Head 5
Tail 10 and Head 7
Tail 11 and Head 4