Why dont you follow same naming conventions for Symbol name in your instrument data for SENSEX, BANKNIFTY, NIFTY etc.
For example for BANKNIFTY

        "token": "44150",
        "symbol,": "BANKNIFTY16OCT2459300CE",
        "name": "BANKNIFTY",
        "expiry": "16OCT2024"

For NIFTY
```
"token": "54543",
"symbol": "NIFTY26SEP2424950PE",
"name": "NIFTY",
"expiry": "26SEP2024",

But for sensex its

        ```
"token": "1126672",
        "symbol": "SENSEX24O1885700CE",
        "name": "SENSEX",
        "expiry": "18OCT2024",

Ideally the name of SENSEX should be SENSEX24OCT2485700CE

Its totally random for sensex not respecting uniformity.