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#13415. 密码

통계

骑士 Borna 正在试图破译他敌人的密信。最近,他得到了一张用于密码的特殊纸张。纸上包含一个由小写字母和数字组成的单词。

秘钥是当所有字母都被替换为空格后,单词中出现的不同整数的数量。这些整数的书写不包含前导零。

由于 Borna 不太擅长处理数字,他向你寻求帮助。

输入格式

第一行包含一个长度在 $1$ 到 $100$ 之间的单词。该单词仅包含小写字母和数字。其中所有的整数最多有三位数字。

输出格式

输出秘钥。

子任务

在价值 $25$ 分的测试数据中,所有整数两两不同。

样例

输入样例 1

abc123abc2a3a1

输出样例 1

4

输入样例 2

borna123vitez

输出样例 2

1

输入样例 3

as23dkrf23smk1asd23sam9

输出样例 3

3

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