Two$-$dimensional list list$\_2$d consists of three lists. List new$\_$row is read from input. Replace the element at index $0$ of list list$\_2$d with new$\_$row.

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Ex: If the input is:

p l u m

then the output is:

$[\text{'}$p$\text{'},\text{'}$l$\text{'},\text{'}$u$\text{'},\text{'}$m$\text{'}]$

$[\text{'}$a$\text{'},\text{'}$p$\text{'},\text{'}$p$\text{'},\text{'}$l$\text{'},\text{'}$e$\text{'}]$

$[\text{'}$m$\text{'},\text{'}$e$\text{'},\text{'}$l$\text{'},\text{'}$o$\text{'},\text{'}$n$\text{'}]$