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- read mode
- litera=${mode:0:1}
- while read linia; do
- if [[ $mode =~ .\+ ]]; then
- linia="${linia//[^$litera]}"
- echo "${#linia}"
- else
- linia="${linia//[^${litera,,}${litera^^}]}"
- echo "${#linia}"
- fi
- done
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