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#!/bin/bash

user_input="$1"

# Read input into an array
mapfile -t strings_file < "$user_input"

# Iterate and extract numbers
for string in "${strings_file[@]}"; do
    number_extract=$(echo "$string" | sed -n 's/.*oo+.*oo+\(.*\)pkp.*/\1/p')

    count_digits=${#number_extract}

    # Check if the length is greater than 7
    if [ "$count_digits" -gt 7 ]; then
        string=$(echo "$string" | sed 's/oo/o/2')
    fi

    # Replace + with :
    string=$(echo "$string" | sed 's/+/:/g')

    echo "$string" >> output_"$user_input"
done

exit 0

Save to: char_edit.sh
Make executable: chmod +x char_edit.sh
Run with: ./char_edit.sh your_file