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Six winds with hooks (682)
Instruction:
Draw hooked lines from the circles. Each line is hooked at the end, it means that it turns one cell back at the angle of 60 deg (see an example). The numbers in circles denote the total length of all the lines including the hooks that originate in the cell with number. The cell with the number itself is not counted. The minimum length of each hooked line is 3 (2 plus hook). The lines may not touch or cross each other. All cells are used exactly once.