Divisible by 3?

How many of the following numbers are divisible by 3?

112123123412345123456123456712345678123456789\begin{array}{l} 1 \\ 12 \\ 123 \\ 1234 \\ 12345 \\ 123456 \\ 1234567 \\ 12345678 \\ 123456789 \\ \end{array}

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