The Sticky Keyboard

This keyboard types fine, but the # key is actually BACKSPACE. What did the message really say? ⌨️

You get the raw typed string, where # deletes the previous surviving character (extra #s on empty do nothing). Print the final message (or nothing if it's all erased).

Example:

Input: typed = "hel#lo" Output: helo

h, e, l get pushed. # pops the l. Then l, o get pushed — leaving h, e, l, o, which spells helo.