{HEAD ~ A fourth step} for {TAIL ~ a hybrid cross} may comprise cross pollination between the first and second parent pea plants 
for
{ HEAD ~ A fourth step } for { TAIL ~ a hybrid cross } may comprise cross pollination between the first and second parent pea plants
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH