#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
#
# @param S string字符串
# @return int整型
#
class Solution:
    def getNumber(self, S: str) -> int:
        # write code here
        '''alp, ans, S = "abcdefghijklmnopqrstuvwxyz", 0, S[::-1]
        for i in range(len(S)):
            ans += (alp.index(S[i])+1)*26**i'''
        alp, ans = "abcdefghijklmnopqrstuvwxyz", 0
        for c in S:
            ans = ans*26+alp.index(c)+1
        return ans
#类似26进制转化为10进制