#!/bin/bash

KOREAN="76"
ENGLISH="64"
MATH="53"

if [ "${KOREAN}" -lt "${ENGLISH}" -a "${KOREAN}" -lt "${MATH}" ]; then
    echo "Korean is lowest"
elif [ "${ENGLISH}" -lt "${KOREAN}" -a "${ENGLISH}" -lt "${MATH}" ]; then
    echo "English is lowest"
elif [ "${MATH}" -lt "${KOREAN}" -a "${MATH}" -lt "${ENGLISH}" ]; then
    echo "Math is lowest"
fi