What does this Assembly snippet output?

1.global _main
2.align 2
3_main:
4    stp x29, x30, [sp, #-48]!
5    mov w8, #20
6    mov w9, #8
7    mov w10, #5
8    mov w11, #3
9    str w8, [sp, #16]
10    str w9, [sp, #20]
11    str w10, [sp, #24]
12    str w11, [sp, #28]
13    ldr w12, [sp, #16]
14    ldr w13, [sp, #20]
15    ldr w14, [sp, #24]
16    ldr w15, [sp, #28]
17    sub w12, w12, w13
18    sub w14, w14, w15
19    sub w12, w12, w14
20    sub sp, sp, #16
21    str x12, [sp]
22    adrp x0, fmt@PAGE
23    add x0, x0, fmt@PAGEOFF
24    bl _printf
25    add sp, sp, #16
26    ldp x29, x30, [sp], #48
27    mov w0, #0
28    ret
29.section __TEXT,__cstring
30fmt: .asciz "%d\n"