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Slitherlink (Encoded) (87)

Other names: Coded Slitherlink

Instruction:
Draw a single, non-intersecting loop that only consists of horizontal and vertical segments between the dots. A number inside a cell indicates how many of the edges of that cell are part of the loop.
Each number has been encoded to a different letter, and each letter stands for a different number. The mapping has not been supplied for you.

Reference: WPF (1)

Examples:
WPF Puzzle GP 2021 - Round 3 (167)
Parent puzzle:
Slitherlink