Easy as Skyscrapers / ABCD Skyscrapers

This Puzzle type appeared in Indian National Puzzle Championship 2008.
Fill the grid with numbers from 1 to 3 (representing the heights of buildings) and letters A, B, C, so that each row and column contains exactly one instance of all these symbols. Digits outside the grid show the number of buildings visible from their positions (shorter buildings are hidden behind the taller ones). Letters outside the grid appear first in corresponding directions.

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