Given a string representation of a train, print an ASCII-art representation of this train.

- `H`: locomotive `<HHHH`
- `P`: passenger car `|OOOO|`

Cars are attached together by `::`

`HPP` —> `<HHHH::|OOOO|::|OOOO|`
- `R`: restaurant car `|hThT|`

`HPRP` —> `<HHHH::|OOOO|::|hThT|::|OOOO|`

- `H`: locomotive attached at the end `HHHH>`

`HPRPH` —> `<HHHH::|OOOO|::|hThT|::|OOOO|::HHHH>`