```
[dhcp177-lan203] z_ISL$ rna_pdb_toolsx.py --rename-chain 'B>5' --inplace spli.pdb
[dhcp177-lan203] z_ISL$ rna_pdb_toolsx.py --rename-chain 'D>6' --inplace spli.pdb
[dhcp177-lan203] z_ISL$ rna_pdb_toolsx.py --rename-chain 'F>2' --inplace spli.pdb
```