verticalslashes.sh

#!/bin/bash

slashes=$(sed 's/\([\/\\]\)/\1/g' <<< "$1")
while [ -n "$slashes" ]; do
    slash=$(cut -c1 <<< "$slashes")
    case "$slash" in
        " ")
            slashes=$(cut -c2- <<< "$slashes");
            if [ "$(cut -c1 <<< "$slashes")" != "/" ]; then
                echo -n "$slash"
            fi
            ;;
        "/") 
            slashes=$(cut -c2- <<< "$slashes" | sed 's/ \([\\\/]\)/\1/g')
            echo "$slash"
            ;;
        "\\")
            slashes=$(cut -c2- <<< "$slashes" | sed 's/\([\\\/]\)/ \1/g')
            echo "$slash"
            ;;
    esac
done
echo