under
Consumes a lambda and applies it to the stack under the top item of the stack.
4 5 ( 2 * ) under → 8 5
5 6 ( copy * ) under → 25 6
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underConsumes a lambda and applies it to the stack under the top item of the stack.
4 5 ( 2 * ) under → 8 5
5 6 ( copy * ) under → 25 6