( Polesz | 2022. 01. 09., v – 13:10 )

#!/bin/bash

HN="$1"

days=("" "Monday" "Tuesday" "Wednesday" "Thursday" "Friday" "Saturday" "Sunday")

IFS=$(echo "${HN}" | cut -c2-2)

read -a numberArray <<< $HN
j=${#numberArray[@]}
i=0

for val in "${numberArray[@]}";
do
  ((i++))
  printf "${days[$val]}";
  if [ "$i" -lt "$j" ]; then
    printf "$IFS";
  fi
done
printf "\n";