.data

.bss
.comm input, 512

.text
.globl _start
_start:

mov $0, %rax
mov $0, %rdi
mov $input, %rsi
mov $512, %rdx
syscall

mov $0, %rcx

_loop:
inc  %rcx

mov $1, %rax
mov $1, %rdi
mov $input, %rsi
mov $512, %rdx
syscall

cmp $6, %rcx
jl _loop

mov $60, %rax
mov $0, %rdi
syscall