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Replace ( Queue , item 1 , item 2 ) Dequeue ( Queue , item ) WHILE ( Item ! = item 1 ) Enqueue

Replace(Queue, item1, item2)
Dequeue(Queue, item)
WHILE(Item != item1)
Enqueue(newQueue, item)
Dequeue(Queue, item)
If(NOT Empty(Queue))
Enqueue(newQueue, item2)
WHILE(Not Empty(newQueue))
Dequeue(newQueue, item)
Enqueue(Queue, item)

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