#!/bin/bash
declare -a array
i=0
#storing country names in the array
while read -r country; do
    array[$i]=$country
    ((i++))
done

for ((j=0;j<i;j++)); do
    if [[ $j -ge 3 ]] && [[ $j -le 7 ]]; then
        echo -n "${array[$j]} "
    fi
done | paste -sd ' '

mapfile -n 5 -s 3 -t array
echo "${array[@]}"

i=0
while read input
do
x[$i]=$input
i=$((i+1))
done
echo ${x[@]:3:5}

readarray array
echo ${array[@]:3:5}

#!/bin/bash
countries=()
while read line;do
countries+=("$line")
done
echo "${countries[@]:3:5}"