火星加法

<div style="margin-left:.38in;text-align:left;vertical-align:baseline;"> <span style="font-size:18.0pt;"><span>•</span></span><span style="font-size:18.0pt;font-family:宋体;color:black;">在</span><span style="font-size:18.0pt;font-family:&quot;color:black;">22 </span><span style="font-size:18.0pt;font-family:宋体;color:black;">世纪，科学家发现，火星上有智慧的居民。火星人都非常喜欢数学。</span> </div> <div style="margin-left:.38in;text-align:left;vertical-align:baseline;"> <span style="font-size:18.0pt;"><span>•</span></span><span style="font-size:18.0pt;font-family:宋体;color:black;">每年，他们都要在火星上举行一次算术竞赛（</span><span style="font-size:18.0pt;font-family:&quot;color:black;">ACM</span><span style="font-size:18.0pt;font-family:宋体;color:black;">）。竞赛的内容是计算两items </span><span style="font-size:18.0pt;font-family:&quot;color:black;">100 </span><span style="font-size:18.0pt;font-family:宋体;color:black;">位数字的和，该大奖的得主是使用时间最少的人。今年他们还请地球上的人参加竞赛。作为地球上唯一的代表，您被发送到火星上，以展示人类的力量。幸好你带上了你的笔记本电脑，它可以帮助你做得很快。</span> </div> <div style="margin-left:.38in;text-align:left;vertical-align:baseline;"> <span style="font-size:18.0pt;"><span>•</span></span><span style="font-size:18.0pt;font-family:宋体;color:black;">现在剩下的问题是，你只需编写一items简短的程序来</span><span style="font-size:18.0pt;"><span></span></span><span style="font-size:18.0pt;font-family:宋体;color:black;">计算两items给定的数字的总和。不过，在开始编写程序前，要记住，火星人使用的是二十进制的数字系统，因为他们通常有</span><span style="font-size:18.0pt;font-family:&quot;color:black;">20 </span><span style="font-size:18.0pt;font-family:宋体;color:black;">根手指。</span> </div> <span style="font-size:18.0pt;"><span></span></span><span style="font-size:18.0pt;font-family:宋体;color:black;"></span><br />

<span style="font-size:18.0pt;font-family:宋体;color:black;">给你若干对火星数字，每items数字占一行。</span><span style="font-size:18.0pt;"><span></span></span><span style="font-size:18.0pt;font-family:宋体;color:black;">火星数字由</span><span style="font-size:18.0pt;font-family:&quot;color:black;">0 </span><span style="font-size:18.0pt;font-family:宋体;color:black;">到</span><span style="font-size:18.0pt;font-family:&quot;color:black;">9 </span><span style="font-size:18.0pt;font-family:宋体;color:black;">，以及从</span><span style="font-size:18.0pt;font-family:&quot;color:black;">a </span><span style="font-size:18.0pt;font-family:宋体;color:black;">到</span><span style="font-size:18.0pt;font-family:&quot;color:black;">j </span><span style="font-size:18.0pt;font-family:宋体;color:black;">的小写字母组成（小写字母</span><span style="font-size:18.0pt;font-family:&quot;color:black;">a </span><span style="font-size:18.0pt;font-family:宋体;color:black;">到</span><span style="font-size:18.0pt;font-family:&quot;color:black;">j </span><span style="font-size:18.0pt;font-family:宋体;color:black;">points别代表</span><span style="font-size:18.0pt;font-family:&quot;color:black;">10</span><span style="font-size:18.0pt;font-family:宋体;color:black;">，</span><span style="font-size:18.0pt;font-family:&quot;color:black;">11</span><span style="font-size:18.0pt;font-family:宋体;color:black;">，</span><span style="font-size:18.0pt;font-family:&quot;color:black;">…</span><span style="font-size:18.0pt;font-family:宋体;color:black;">，</span><span style="font-size:18.0pt;font-family:&quot;color:black;">19</span><span style="font-size:18.0pt;font-family:宋体;color:black;">）。</span><span style="font-size:18.0pt;font-family:宋体;color:black;"></span><span style="font-size:18.0pt;"><span></span></span><span style="font-size:18.0pt;font-family:宋体;color:black;">给定的数字的长度不会超过</span><span style="font-size:18.0pt;font-family:&quot;color:black;">100 </span><span style="font-size:18.0pt;font-family:宋体;color:black;">位。</span>

<span style="font-size:18.0pt;font-family:宋体;color:black;">对于每对数字，在一行上输出它们的和。</span>