Which of the following is NOT one of the 6 main types of simple machines?

kyle.lichtenwald

clinton.brown

a_vera

ccooper

grace.tuju

davidrdayii1

kkelly

burnette

esraezici

ddaniel

katarudka

aliciaklucas

mcheney

amy.hall

bjelik.blanka

madelyn.lehr

n.almalh86

Mr. Q.

jbottigliero