United Sudoku Triples Sunday

Sudoku Triples consists of three standard Sudoku panels, sharing one set of 3×3 boxes. Each row, column and 3×3 box must contain the numbers 1-9 with no repeats. Each 3×3 box in the shared section of the three panels is filled in identically. Therefore, finding a number in one box in the shared section advances the other three boxes.