N.4 composed of three balls from left size 2.7 cm center 3.8 cm right 2.8 cm long 50.5 cm,
N 5 composed of three balls from left size 2.5 cm center cm right 2.7 cm long 53.5 cm,
N. 6 composed of three balls from left size 3.5 cm center 4.3 cm right 3.5 cm long 53.5 cm