selenium python cannot send number as key for input

i tried to send phone numbers to input element below

<div id="mainframe.childframe.form.div_main.form.div_work.form.edt_mbtlTelNoCentral" class="Edit" tabindex="-1" style="left:309px;top:305px;width:85px;height:28px;" aria-label="휴대전화 가운데자리(필수입력) " aria-description="" userstatus="" status="enabled"><input id="mainframe.childframe.form.div_main.form.div_work.form.edt_mbtlTelNoCentral:input" class="nexainput" style="left:0px;top:0px;width:83px;height:26px;ime-mode:disabled;" value="" maxlength="4" type="text"><input id="mainframe.childframe.form.div_main.form.div_work.form.edt_mbtlTelNoCentral:input" class="nexainput" style="left:0px;top:0px;width:83px;height:26px;ime-mode:disabled;" value="" maxlength="4" type="text"></div>

with this code

actions = ActionChains(driver)
ele = driver.find_element_by_xpath('//*[@maxlength="4"]')
actions.click(ele).key_down(Keys.CONTROL).send_keys("a").key_up(Keys.CONTROL).send_keys("Keys.Delete").send_keys('9049').perform()

but it keep send key like this enter image description here

how can i fix this?