Problems
Sleeping cars
Sleeping cars
A train contains sleeping cars, marked with letter $k$, and sitting cars, marked with letter $p$. Find the biggest number of sleeping cars that follow each other in the train.
\InputFile
One line contains a sequence of letters $k$ and $p$, with length from $1$ to $1000$ characters.
\OutputFile
Print the maximum number of seeping cars that follow each other.
Input example #41
kpkkp
Output example #41
2