What

何と

nanto

(beginning an exclamation)

何

nani

(expression of surprise)

こと

koto

(fused relative pronoun: that which; those that; the thing(s) that)

の

no

(fused relative pronoun: that which; those that; the thing(s) that)

何

nani

(what? (interrogative pronoun))

物

mono

(fused relative pronoun: that which; those that; the thing(s) that)