more-on-conditionals.sh

read x
read y
read z

if [[ $x != $y && $x != $z && $y != $z ]]; then
    echo "SCALENE"
else
    if [[ $x == $y && $x == $z && $y == $z ]]; then
        echo "EQUILATERAL"
    else
        echo "ISOSCELES"
    fi
fi