digraph b {
NODETYPEA42;
NODETYPEA43;
NODETYPEA44;
NODETYPEA45;
NODETYPEA46;
NODETYPEA47;
NODETYPEA48;
NODETYPEA49;
NODETYPEA50;
NODETYPEA51;
NODETYPEA52;
NODETYPEA53;
NODETYPEA54;
NODETYPEB1;
NODETYPEB2;
NODETYPEB3; 
NODETYPEB4; 
NODETYPEB5; 
NODETYPEA42 -> NODETYPEA43;
NODETYPEA43 -> NODETYPEA44;
NODETYPEA44 -> NODETYPEA45;
NODETYPEA45 -> NODETYPEA46;
NODETYPEA46 -> NODETYPEA47;
NODETYPEA47 -> NODETYPEA48;
NODETYPEA48 -> NODETYPEA49;
NODETYPEA49 -> NODETYPEA50;
NODETYPEA50 -> NODETYPEA51;
NODETYPEA51 -> NODETYPEA52;
NODETYPEA52 -> NODETYPEA53;
NODETYPEA53 -> NODETYPEA54;
NODETYPEB1 -> NODETYPEB2;
NODETYPEB2 -> NODETYPEB3;
NODETYPEB3 -> NODETYPEB4;
NODETYPEB4 -> NODETYPEB5
NODETYPEA44 -> NODETYPEB1;
NODETYPEA49 -> NODETYPEB3;
NODETYPEA53 -> NODETYPEB5;



}