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LC Sudoku (406)
Instruction:
Apply classic sudoku rules. Whenever two adjacent numbers in a row or column add up to 50 or 100, this is marked by a letter L or C respectively, placed on the line separating the two numbers. Two-digit numbers are formed by combining adjacent digits (reading from left to right or top to bottom only). All possible letters L and C are marked. Row and column strings which would result in the leters L and C coinciding (e.g. 5248) will not occur.