there are 2 Ms:

_ _ M _ _ _ _ _ _ | _ _ _ _ _ _ | _ _ _ _ | _ _ _ | _ _ M _ _

May I have an R please?

no Rs, sorry!

Damn didn't see that coming so that means the head for the body is there.

May I have an A?

one A:

_ _ M _ _ _ _ _ _ | _ _ _ _ _ _ | _ _ _ _ | _ A _ | _ _ M _ _

body parts: head

May I have an S please?

three Ss:

S _ M _ _ _ _ _ _ | _ _ _ _ _ _ | _ _ _ S | _ A _ | _ _ M _ S

body parts: head

May I have an E, sir?

three Es:

S _ M E _ _ _ _ _ | _ _ _ _ E _ | _ _ _ S | _ A _ | _ _ M E S

body parts: head

How about an O?