C01: sort -nru
C02: cut -d ',' -f 3 | sort -nr | head -1
C03: 
head -123 | tail +123
ALBO
sed -n '123p'
C04: 
head -20 | tail +10
ALBO
sed -n '10,20p'
C05: grep -Eo '(cz|sz)' | wc -l
C06: sed -En 's/[ĄŻŹĆŚŃŁÓĘ]/X/gip'
C07: cat -n | sort -nr
C08: grep -o '[^[:punct:]]*' | wc -w