A number and word arrangement machine rearranges the input line of numbers and words following a particular rule in each step. The input and its rearrangement steps are as follows:

Input: speed 56 bike 23 increasing 34 of 49 rapidly 76

Step 1: of speed 56 bike 23 increasing 34 49 rapidly 76

Step 2: increasing of speed 56 bike 23 34 49 rapidly 76

Step 3: bike increasing of speed 56 23 34 49 rapidly 76

Step 4: 56 bike increasing of speed 23 34 49 rapidly 76

Based on the above steps, answer the following question:

Which element is present fourth to the left of the third element from the right end in Step 4?

Question

A number and word arrangement machine rearranges the input line of numbers and words following a particular rule in each step. The input and its rearrangement steps are as follows:

Input: speed 56 bike 23 increasing 34 of 49 rapidly 76

Step 1: of speed 56 bike 23 increasing 34 49 rapidly 76

Step 2: increasing of speed 56 bike 23 34 49 rapidly 76

Step 3: bike increasing of speed 56 23 34 49 rapidly 76

Step 4: 56 bike increasing of speed 23 34 49 rapidly 76

Based on the above steps, answer the following question:

Which element is present fourth to the left of the third element from the right end in Step 4?

Accepted Answer

**Solution:**

1. Understand the pattern from the example given:
   - Words are moved stepwise from right to left in a particular order.
   - At each step, one word moves from the right side towards the left, pushing the previous words rightwards.

2. Given input:
   speed 56 bike 23 increasing 34 of 49 rapidly 76

3. Steps given:
   - Step 1: of speed 56 bike 23 increasing 34 49 rapidly 76
   - Step 2: increasing of speed 56 bike 23 34 49 rapidly 76
   - Step 3: bike increasing of speed 56 23 34 49 rapidly 76
   - Step 4: 56 bike increasing of speed 23 34 49 rapidly 76

4. Analyze Step 4:
   The sequence is:
   56, bike, increasing, of, speed, 23, 34, 49, rapidly, 76

5. Identify the third element from the right end:
   - Right end elements: 76 (1st), rapidly (2nd), 49 (3rd)

6. Find the element fourth to the left of this element (49):
   - Position of 49 is 8th from left (counting from 1)
   - Fourth to the left means 8 - 4 = 4th element from left
   - 4th element is "of"

**Answer:** of

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