Regular expressions find the rodents (solution)

Exercise

Output solution

Rows: 3441 Columns: 1
── Column specification ────────────────────────────────────────────────────────
Delimiter: "\001"
chr (1): X1

ℹ Use `spec()` to retrieve the full column specification for this data.
ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.