0 -> cp
cp -> 0
cp -> ca
ca -> cp
ca -> dho
dho -> ca
dho -> oro
oro -> dho
oro -> omp
omp -> oro
omp -> ump
ump -> omp
ump -> udp
udp -> ump
udp -> utp
utp -> udp
utp -> 0
0 -> utp
utp -> ctp
ctp -> utp
ctp -> 0
0 -> ctp
cp -> 0
0 -> cp
ca -> 0
0 -> ca
dho -> 0
0 -> dho
oro -> 0
0 -> oro
omp -> 0
0 -> omp
ump -> 0
0 -> ump
udp -> 0
0 -> udp
utp -> 0
0 -> utp
ctp -> 0
0 -> ctp