... ,S,RD,S,R27S,S,RD,S,RD,S,RD,S,RD,S,R30D,SD,S,RD,S,RD,S,RT,S,R33D,S,RD,S,RD,S,RD,S,RT,S,R36D,S,RD,S,RD,S,RD,S ... ,RT,S ... ,D,R------54D,D,RD,D,R-----T,D,R-----57D,D,RT,D,R------T,D,R-----60D,D,RT,D ... ,R--------T,D,R-----61T,D,R---------------------- bailey bridge ...