Unrecognized input: 10 рублей + 10 USD + 10 рупий

## Input that failed to parse

```
10 рублей + 10 USD + 10 рупий
```

## Error message

```
Unit mismatch: cannot add 'рублей' and 'USD'
```

## Expected behavior

Please describe what you expected the calculator to do with this input.

Such input should be supported and treated as: `10 RUB + 10 USD + 10 INR`