Letters that make butterfly stroke
s, o, b, e, f, k, l, r, t, u, y are letters that make 'butterfly stroke'
Words within butterfly stroke
ER, RF, te, butter, ut, Ro, TT, fly, utter, ok, but, OK, stroke, butterfly, butt, FL, Butte, butte, Er, Rf, Te, UT are words within 'butterfly stroke'