.data
X: .asciiz " Please, enter your exam score: "
Excelent: .asciiz "your grade is A"
Verygood: .asciiz "your grade is B" 
Good: .asciiz "your grade is C"
Weak: .asciiz "your grade is D"
Fail: .asciiz "your grade is F"


.text
li $s0, 90
li $s1,80
li $s2,70
li $s3,60
li $v0, 4
la $a0, X
syscall
li $v0, 51
la $a0, X
syscall

move $t0, $a0
bge $t0, $s0, A
bge $t0, $s1, B
bge $t0, $s2, C
bge $t0, $s3, D
li $v0, 55
la $a0,Fail
syscall
li $v0, 10
syscall
li $v0, 10
syscall

D: li $v0, 55
la $a0, Weak
syscall
li $v0, 10
syscall

C: li $v0, 55
la $a0, Good 
syscall
li $v0, 10
syscall

B: li $v0, 55
la $a0, Verygood
syscall
li $v0, 10
syscall

A: li $v0, 55
la $a0, Excelent
syscall