# -*-coding:utf-8-*-
def my_strip(s):
    result=''
    for x in range(len(s)):
        if s[x] != ' ':
            result = s[x:]
            break
    for y in range(0,-len(result)-1,-1):
        if s[y] != ' ':
            result = s[-len(result):y+1]
            break
    return result