.text
.type capitalize, @function
.global capitalize


capitalize:
    MOV $0, %rdx
    MOV $0, %rcx
    MOV %rdi, %rax ############

loop:
    MOVB    (%rdi, %rcx, 1), %r8b #########
    CMP $0, %r8b
    JE      end

    INC %rcx ################

   CMP  $('.'), %r8b
   JE       check_if_next_is_small_letter
   CMP  $('?'), %r8b
   JE       check_if_next_is_small_letter
   CMP  $('!'), %r8b
   JE       check_if_next_is_small_letter
   JMP  loop

check_if_next_is_small_letter:
    INC %rcx ################

    MOVB (%rdi, %rcx, 1), %r8b #############
    CMP $0, %r8b
    JE      end
    CMP $' ', %r8b
    JE      check_if_next_is_small_letter
    CMP $'\n', %r8b
    JE      check_if_next_is_small_letter

change_char:
   CMP  $'a', %r8b
   JL       loop
   CMP  $'z', %r8b
   JG       loop
   SUBB $32, %r8b
   MOV %r8b, (%rdi, %rcx, 1) ##############
   JMP loop #############

end:
    ret