BEGIN {FS = " " }

{
END_match = match($0,"LIG     0")
TRI_match = match($0,"TRIPOS>MOLECULE")
LIG_match = match($0,"LIGAND")

if (END_match == 0) {
 if (LIG_match != 60) {
  if (TRI_match == 3) {
   getline
   name = $1
   short_nam = substr(name,3,2)
   printf("%s\n","@<TRIPOS>MOLECULE")
   }
  else {
   printf("%s\n",$0)
   }
 }
 else {
 split ($0,first,"LIGAND")
 printf("%s\t%s\t%s\n",first[1],short_nam,first[2])
  }
 }
else {
 split ($0,last,"LIGAND")
 printf("%s\t%s\t%s\n",last[1],short_nam,last[2])
 short_nam = " "
 }
}