org 0x100
        jmp main

A:      db 'A','$'
B:      db 'B','$'
C:      db 'C','$'
D:      db 'D','$'
E:      db 'E','$'
outOfRange: db 'Out of range', '$'

stdout:
        mov ah,0x09
        int 21h
        ret

main:
        ; Test value 71
        mov al,71

        cmp al,89
        jg catA

        cmp al,79
        jg catB

        cmp al,69
        jg catC

        cmp al,59
        jg catD

        cmp al,59
        je catE
        jl catE
        jmp badInput

done:
        call stdout
        int 20h

badInput:
        mov dx,outOfRange
        call stdout
        int 20h

catA:
        cmp al,100
        jg badInput
        mov dx,A
        jmp done

catB:
        mov dx,B
        jmp done

catC:
        mov dx,C
        jmp done

catD:
        mov dx,D
        jmp done

catE:
        mov dx,E
        jmp done