**Describe the issue**
```
milovidov-desktop :) SELECT parseDateTimeBestEffort('20220101-010203')

SELECT parseDateTimeBestEffort('20220101-010203')


0 rows in set. Elapsed: 0.153 sec. 

Received exception:
Code: 41. DB::Exception: Cannot read DateTime: unexpected number of decimal digits for time zone offset: 6: While processing parseDateTimeBestEffort('20220101-010203'). (CANNOT_PARSE_DATETIME)
```
readDecimalNumber<4>(year, digits);
                    readDecimalNumber<2>(month, digits + 4);
                }
                else if (!has_time)
                {
                    readDecimalNumber<2>(hour, digits);
                    readDecimalNumber<2>(minute, digits + 2);
                    readDecimalNumber<2>(second, digits + 4);
                    has_time = true;
                }
                else
                    return on_error("Cannot read DateTime: ambiguous 6 digits, it can be YYYYMM or hhmmss", ErrorCodes::CANNOT_PARSE_DATETIME);
            }
            else if (num_digits == 4 && !year)
            {
                
                
                
                
                
                
                readDecimalNumber<4>(year, digits);
                if (!in.eof())
                {
                    char delimiter_after_year = *in.position();
                    if (delimiter_after_year < 0x20
                        || delimiter_after_year == ','
                        || delimiter_after_year == ';'
                        || delimiter_after_year == '\''
                        || delimiter_after_year == '"')