Read the following information carefully and answer the questions that follow:
Aword-number arrangement machine, when given input as set of words and numbers, rearranges them following a particular rule and generates a stepwise output until the rearrangement is complete following that rule. Following is an illustration of the input and steps of rearrangement until the last step.
Input: Tokyo 7 Rio @ 5 Salva We
Step 1: Tokyo 7 Rio @ We 5 Salva
Step 2: Tokyo 7 Rio We @ 5 Salva
Step 3: 7 Rio @ We 5 Salva Tokyo
Step 4: Rio 7 @ We 5 Salva Tokyo
In addition, step 4 is the last step.
For the input, “Let 1 mail & check me and”, What is Step 4?