Free create symmetric list online tool

Apply 'create symmetric list' tools after selecting required items

Options
Input Item Splitter
List Symmetry Type
For example: "a, b, c" → "a, b, c, c, b, a".
For example: "a, b, c, b" → "a, b, c, b, a".
For example: "a, b, c" → "a, b, c, b, a".
Symmetric List Options
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