S 1 2 a b c

S 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b c
S 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b c
S 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b cS 1 2 a b c