### reformatDate 
from typing import *
def f_gold(date: str) -> str:
    months = [
        "Jan",
        "Feb",
        "Mar",
        "Apr",
        "May",
        "Jun",
        "Jul",
        "Aug",
        "Sep",
        "Oct",
        "Nov",
        "Dec",
    ]
    mapper = {v: str(k + 1) for k, v in enumerate(months)}
    split = date.split(' ')
    year = split[2]
    month = mapper.get(split[1])
    day = split[0][: len(split[0]) - 2]
    return year + '-' + month.zfill(2) + '-' + day.zfill(2)