print_letter.sh

#!/usr/bin/env bash

letters=('A' 'B' 'C')
line1=('oxxo' 'xxxx' 'xxxx')
line2=('xoox' 'xoox' 'xooo')
line3=('xxxx' 'xxxo' 'xooo')
line4=('xoox' 'xoox' 'xooo')
line5=('xoox' 'xxxx' 'xxxx')


read -a input_name -p "Enter your name (uppercase and space between ex: O Z C A N): "
read -a input_char -p "Enter char [*]: "
input_char=${input_char:-*}

function print_me() {
    arr=("$@")
    string=""
    for i in ${input_name[@]} ; do
        c=0
        for letter in ${letters[@]} ; do
          if [ $letter == $i ]; then
            string+="${arr[c]}  "
            break
          fi
        ((c=c+1))
        done
    done
    echo "${string}" | sed "s/o/ /g" | sed "s/x/${input_char}/g"
}


print_me ${line1[@]}
print_me ${line2[@]}
print_me ${line3[@]}
print_me ${line4[@]}
print_me ${line5[@]}