An input-output arrangement machine rearranges a line of words and numbers one step at a time, always by the same rule. The rule is not stated, but it can be read off the run below.
Input: 27 mandir 58 chaupal 46 ghat.
Step 1: mandir 27 58 chaupal 46 ghat.
Step 2: mandir chaupal 27 58 46 ghat.
Working by the same rule, which of the following is Step 2 for the input line: 63 tabla 41 sitar 29 veena?

In the run shown, the words are being gathered at the left end one per step, in the order in which they stand in the input, while everything else closes up behind them. Applying that to 63 tabla 41 sitar 29 veena: Step 1 brings tabla to the front — tabla 63 41 sitar 29 veena. Step 2 brings sitar to the place just after tabla — tabla sitar 63 41 29 veena, the answer. "tabla 63 41 sitar 29 veena" is Step 1. "tabla sitar veena 63 41 29" is Step 3, when all three words have been gathered. "sitar tabla 63 41 29 veena" gathers the words in reverse order, which the shown run does not do.