Hello I have a file that looks like this:
ZC12A_MOUSE Mus musculus Q5D1E7 PDB; 2N5J; NMR; -; A=45-89. PDB; 2N5K; NMR; -; A=299-327. PDB; 2N5L; NMR; -; A=544-596. PDB; 5H9V; X-ray; 2.75 A; A/B/C/D=134-339. PDB; 5H9W; X-ray; 2.60 A; A/B=134-339. ZHX1_HUMAN Homo sapiens Q9UKY1 PDB; 2ECB; NMR; -; A=565-640. PDB; 2GHF; NMR; -; A=60-153. PDB; 2LY9; NMR; -; A=462-532. PDB; 3NAR; X-ray; 2.60 A; A/B=655-731. ZHX2_HUMAN Homo sapiens Q9Y6X8 PDB; 2DMP; NMR; -; A=524-599. PDB; 3NAU; X-ray; 2.70 A; A/B=444-501.
I am trying to count the "blocks" in the file (here I have 3). So I can do this but counting the number of times it appears that in first column there is some letter/number? Is there some bash command that I could use?