while ($j <= $numstruc)
grep -v TER structur$j.pdb > structure$i.pdb
grep " A " structure$i.pdb > structure${i}a.pdb
-grep " B " structure$i.pdb > structure${i}b.pdb
+egrep " B | C " structure$i.pdb > structure${i}b.pdb
pulchra306/pulchra -q -f -g structure${i}a.pdb
pulchra306/pulchra -q -f -g structure${i}b.pdb