#!/usr/bin/perl -w

if($ARGV[0] ~~ [0..39]){
    print "The student has gotten a F grade for the score of $ARGV[0].
+";
}elsif($ARGV[0] <= 49) {
    print "The student has gotten a E grade for the score of $ARGV[0].
+";
}elsif($ARGV[0] <= 59) {
    print "The student has gotten a D grade for the score of $ARGV[0].
+";
}elsif($ARGV[0] <= 64) {
    print "The student has gotten a C grade for the score of $ARGV[0].
+";
}elsif($ARGV[0] <= 69) {
    print "The student has gotten a C+ grade for the score of $ARGV[0]
+.";
}elsif($ARGV[0] <= 74) {
    print "The student has gotten a B grade for the score of $ARGV[0].
+";
}elsif($ARGV[0] <= 79) {
    print "The student has gotten a B+ grade for the score of $ARGV[0]
+.";
}elsif($ARGV[0] <= 100) {
    print "The student has gotten a A grade for the score of $ARGV[0].
+";    
}else {
     print "Please enter a value between 0 and 100"; 
}