#
# 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 
# @param t string字符串 
# @return bool布尔型
#
class Solution:
    def isSubsequence(self , s: str, t: str) -> bool:
        # write code here
		# 先排除任一字符串为空的情况
        if s == '' or t == '':
            return False
        # 遍历t,并与s中的字符逐一比对
        k = 0
        for c in t:
            if c == s[k]:
                k += 1
                if k == len(s):
                    return True
        return False