I need help decoding the following $3$ love

$6$ computers

$2$ dogs

$4$ cats

$1$ I

$5$ you

In this file, each line contains a number followed by a word. The task is to decode a hidden message based on the arrangement of these numbers into a "pyramid" structure. The pyramid increases by one number per line, like so:

$1$

$23$

$456$

The key to decoding the message is to use the words corresponding to the numbers at the end of each pyramid line $($in this example, $1,3,$ and $6).$ You should ignore all the other words. So for the example input file above, the message words are:

$1$: I

$3$: love

$6$: computers