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I have lists such as {{1, 1}, {8, 2}, {7, 4}, {1, 1}}then {{8, 2}, {15, 5}, {7, 4}, {8, 2}}then {{18, 4}, {15, 5}, {8, 2}, {18, 4}}I want to create  [mcode]{{{1, 1}, {8, 2}, {7, 4}, {1, 1}} , {{8, 2}, {15,...
Thank you very much Arnoud..