%macro scall 4
	mov rax,%1
	mov rdi,%2
	mov rsi,%3
	mov rdx,%4
	syscall
%endmacro

section .data

	m1 db 10d,"Enter a string : ", 10d,13d
	l1 equ $-m1
	
	m2 db 10d,"String you entered is : "
	l2 equ $-m2
	
    m3 db "Reversed String : "
    l3 equ $-m4
	
section .bss
	string resb 20
    string2 resb 20
    char_ans resb 50

section .text
global _start

_start:
    scall 1,1,m1,l1
    scall 0,0,string,20
    scall 1,1,m2,l2
    scall 1,1,string,20
    scall 1,1,m3,l3

    mov rsi,string
    mov rcx, 0
    
loop:
    mov al,[rsi]
    cmp al,0Ah
    je next
    inc cx
    inc rsi
    jmp loop

next:
    mov rbp,string2
    dec rsi
    add rcx,2

loop2:    
    mov ax,[rsi]
    mov [rbp],ax
    inc rbp
    dec rsi
    dec rcx
    jnz loop2

    scall 1,1,string2,20

     mov rax,60
    mov rdi,0
    syscall