section	.text
global _start

_start:
	mov ecx, string

.loop:
    mov ax, [ecx]
    cmp ax, 0
    jz .fin
    cmp ax, 'a'
    jl .inc
    cmp ax, 'z'
    jg .inc
    add ax, 32

.inc:
    inc ecx
    jmp .loop

.fin:
    mov eax, 4  ;system call number (sys_write)
    mov ebx,1   ;file descriptor (stdout)
    mov ecx,string
    int 80h
    mov eax,1   ;system call number (sys_exit)
	int	0x80

section	.data
    string	db	'h4ppy c0ding',0xa