* select all the letters * select only the numbers * select only the middle three characters abc123xyz 123efg456 * select all the tacocats * exclude the tacocat that ends with '.' * get only the tacocat in parentheses tacocat tacoca tacocat. (tacocat) Tacocat * Select the lines that contain whitespace 1. abc 2. abc 3. abc 4.abc * Capture () anything that ends with .pdf file_record_transcript.pdf file_record_transcript file_07241999.pdf file_07241999 testfile_fake.pdf.tmp 1. COUNTY CODES MA, 25, 001, Barnstable County, H1 MA, 25, 003, Berkshire County, H4 MA, 25, 005, Bristol County, H1 MA, 25, 007, Dukes County, H1 MA, 25, 009, Essex County, H4 MA, 25, 011, Franklin County, H4 MA, 25, 013, Hampden County, H4 MA, 25, 015, Hampshire County, H4 MA, 25, 017, Middlesex County, H4 MA, 25, 019, Nantucket County, H4 MA, 25, 021, Norfolk County, H1 MA, 25, 023, Plymouth County, H1 MA, 25, 025, Suffolk County, H4 MA, 25, 027, Worcester County, H4 VA, 51, 193, Westmoreland County, H1 VA, 51, 195, Wise County, H1 VA, 51, 197, Wythe County, H1 VA, 51, 199, York County, H1 VA, 51, 510, Alexandria city, C7 VA, 51, 515, Bedford city, C7 VA, 51, 520, Bristol city, C7 VA, 51, 530, Buena Vista city, C7 VA, 51, 540, Charlottesville city, C7 VA, 51, 550, Chesapeake city, C7 VA, 51, 570, Colonial Heights city, C7 2. DNA SEQUENCES ATG CAA TGG GGA AAT GGT ACC AGG TCC GAA CTT AAT GAG GTA AGA CAG ATT TAA A TGC AAT GGG GAA ATG TTA CCA GGT CCG AAC TTA TTG AGG TAA GAC AGA TTT AA AT GCA ATG GGG AAA TGT TAC CAG GTC CGA ACT TAT TAA GGT AAG ACA GAT TTA A 3. SUPER CHALLENGE BARENTS_SEA_PERSEY_Nansen_surface_net_333_um_272_71.9333_33.9167 POLAR_BASIN_DRIFTING_STATION_SEVERNYI_POLUS_2_Nansen_closing_net_333_um_mesh_3464_80.9_-161.533