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(1) What is the symbol of shells [2, 8, 13, 2]?
(2) What is the symbol of shells [2, 5]?
(3) What is the symbol of shells [2, 8, 8, 2]?
(4) What is the symbol of shells [1]?
(5) What is the symbol of shells [2, 6]?
(6) What is the symbol of shells [2, 8, 6]?
(7) What is the symbol of shells [2, 8]?
(8) What is the symbol of shells [2, 8, 8, 1]?
(9) What is the symbol of shells [2, 3]?
(10) What is the symbol of shells [2, 7]?