thr + ow
throw
shr + ink
shrink
str + aw
straw
spr + ing
spring
scr + ape
scrape
spr + ay
spray
spr + inkle
sprinkle
spl + endid
splendid
scr + eam
scream
shr + imp
shrimp
scr + ub
scrub
shr + ek
shrek
scr + oll
scroll
spl + ash
splash
spr + out
sprout
str + ong
strong
str + eet
street
str + ing
string
thr + ee
three
spl + it
split