Hi everyone,

I want to do operation with chars in the given string. Actually I want to
grouping the same chars.

For example;

input : "344111133311222223377"
operation-> (3)(44)(1111)(333)(11)(22222)(33)(77)
output: "34131237"



How can I do without list, regular expression. just using string
operations. Using an effective methods of python for this problem.


Thanks,
Best regards.
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