toplevel "System";

"System" pand "A" "B";

"A" and "AA" "AB" "AC" "AD";

"B" pand "C" "D";

"C" and "CA" "CB" "CC" "CD";

"D" and "DA" "DB" "DC" "DD";

"AA" lambda=1 dorm=0;
"AB" lambda=1 dorm=0;
"AC" lambda=1 dorm=0;
"AD" lambda=1 dorm=0;

"CA" lambda=1 dorm=0;
"CB" lambda=1 dorm=0;
"CC" lambda=1 dorm=0;
"CD" lambda=1 dorm=0;

"DA" lambda=1 dorm=0;
"DB" lambda=1 dorm=0;
"DC" lambda=1 dorm=0;
"DD" lambda=1 dorm=0;