I have two columns in my table.

1. username
2. data

In data column there is data like this

tptes 2190110 134 350 1220 175 255 400 270 0 180 100 40 735 100

I want to update by specifying username and how much to add to third number from left.

For example I want to add 50 then value 134 would become into 184. Also all other values stay untouched.

Please note that these values are always different to every user.