Write a java function to solve the below

s $=$ "adpgki", t$=$"cdmxki", k$=6$

$1.$ Change s$0$ from $\text{'}$a$\text{'}$ to $\text{'}$c$\text{'}$ with cost$=$abs$(\text{'}$a$\text{'}-\text{'}$c$\text{'})=2.$ String s is now "cdpgki" and k$=6-2=4$

$2.$ Change s$2$ from $\text{'}$p$\text{'}$ to $\text{'}$m$\text{'}$ with cost $=$abs$(\text{'}$p$\text{'}-\text{'}$m$\text{'})=3.$ String s is 'cdmgki' and k$=4-3=1$

$3.$ The only character left to change is $\text{'}$g$\text{'}$ to $\text{'}$x$\text{'}$ which costs more than k