题解 | #字符串字符匹配#

def is_substr(s1, s2):
    for c in s1:
        if c not in s2:
            return False
    return True
while True:
    try:
        s1 = input()
        s2 = input()
    except EOFError:
        break
    print('true' if is_substr(s1,s2) else 'false')