Score : $200$ points

问题描述

你将得到三个由小写英文字母组成的字符串 $S_1, S_2, S_3$，以及一个由字符 1, 2, 3 组成的字符串 $T$。

根据 $T$ 中的字符顺序拼接这三个字符串，并输出结果字符串。具体规则如下：

• 对于满足 $1 \leq i \leq |T|$ 的每个整数 $i$，定义字符串 $s_i$ 如下：
  • 若 $T$ 的第 $i$ 个字符为 1，则 $s_i = S_1$；
  • 若 $T$ 的第 $i$ 个字符为 2，则 $s_i = S_2$；
  • 若 $T$ 的第 $i$ 个字符为 3，则 $s_i = S_3$。
• 按照顺序拼接字符串 $s_1, s_2, \dots, s_{|T|}$ 并打印出最终得到的字符串。

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

You are given three strings $S_1, S_2, S_3$ consisting of lowercase English letters, and a string $T$ consisting of 1, 2, 3.

Concatenate the three strings according to the characters in $T$ and print the resulting string. Formally, conform to the following instructions.

• For each integer $i$ such that $1 \leq i \leq |T|$, let the string $s_i$ be defined as follows:
  • $S_1$, if the $i$-th character of $T$ is 1;
  • $S_2$, if the $i$-th character of $T$ is 2;
  • $S_3$, if the $i$-th character of $T$ is 3.
• Concatenate the strings $s_1, s_2, \dots, s_{|T|}$ in this order and print the resulting string.

Constraints

• $1 \leq |S_1|, |S_2|, |S_3| \leq 10$
• $1 \leq |T| \leq 1000$
• $S_1$, $S_2$, and $S_3$ consist of lowercase English letters.
• $T$ consists of 1, 2, and 3.

Input

Input is given from Standard Input in the following format:

$S_1$

$S_2$

$S_3$

$T$

Output

Print the answer.

Sample Input 1

mari
to
zzo
1321

Sample Output 1

marizzotomari

We have $s_1 =$ mari, $s_2 =$ zzo, $s_3 =$ to, $s_4 =$ mari. Concatenate these and print the resulting string: marizzotomari.

Sample Input 2

abra
cad
abra
123

Sample Output 2

abracadabra

Sample Input 3

a
b
c
1

Sample Output 3

a

update @ 2024/3/10 09:40:32