define a function that compresses a string it takes as an input from the user if it has long sequences of equal characters. the code should accept one string as an argument and return the compressed form of the sprint$($compress dict$($aaaabbaaabbbbbbcccd$))$

$4$a$2$b$3$a$5$b$3$c$1$dtring. a sample is print$($compress dict$($aaaabbaaabbbbbbcccd$))$

$4$a$2$b$3$a$5$b$3$c$1$d