Formula for counting from the right to the left

[dabe]

Hello everyone!
So, I have this table (attached) and I need to find a formula that will count the 0s from the right to the left, with condition that the row is starting with 0 and is no less than 2 0s (from the right to the left of a row).

Thank you in advance.

Capture.PNG

[Bill1234]

Will this do what you want?

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[dabe]

it could work. Thank you Bill.