In the look-and-say sequence, each new term describes groups of equal digits in the previous string. For example, 21 is read as “one 2, one 1”, so the next term is 1211. Write a function look_and_say that takes a digit string s and returns the next term. Count only consecutive runs of the same digit, not all matching digits across the whole string.

def look_and_say(s: str) -> str: