Score : $100$ points

问题陈述

有 $12$ 个字符串 $S_1, S_2, \ldots, S_{12}$，由小写英文字母组成。

找出有多少个整数 $i$ $(1 \leq i \leq 12)$ 满足 $S_i$ 的长度为 $i$。

以上为大语言模型 kimi 翻译，仅供参考。

Problem Statement

There are $12$ strings $S_1, S_2, \ldots, S_{12}$ consisting of lowercase English letters.

Find how many integers $i$ $(1 \leq i \leq 12)$ satisfy that the length of $S_i$ is $i$.

Constraints

• Each $S_i$ is a string of length between $1$ and $100$, inclusive, consisting of lowercase English letters. $(1 \leq i \leq 12)$

Input

The input is given from Standard Input in the following format:

$S_1$

$S_2$

$\vdots$

$S_{12}$

Output

Print the number of integers $i$ $(1 \leq i \leq 12)$ such that the length of $S_i$ is $i$.

Sample Input 1

january
february
march
april
may
june
july
august
september
october
november
december

Sample Output 1

1

There is only one integer $i$ such that the length of $S_i$ is $i$: $9$. Thus, print 1.

Sample Input 2

ve
inrtfa
npccxva
djiq
lmbkktngaovl
mlfiv
fmbvcmuxuwggfq
qgmtwxmb
jii
ts
bfxrvs
eqvy

Sample Output 2

2

There are two integers $i$ such that the length of $S_i$ is $i$: $4$ and $8$. Thus, print 2.