What is the Appium Android name for the check button on Android keyboard which has a, b, c, ..., and back, cap buttons

There is a “check” button on Android keyboard, I could not find the official name from either org.openqa.selenium.Keys, nor io.appium.java_client.android.nativekey.AndroidKey.
I used both ENTER and RETURN, none of them is working. I could not find DONE or SUBMIT buttons

Hi mykola-mokhnach, it works. thanks very much!