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step2/wenti.sh

@@ -2,7 +2,13 @@
 
 #将答案填写在下方空白区域
 #/**********  Begin  **********/#
+touch c.txt
+touch d.txt
 
+cat a.txt | tr -s '\n' | grep -Eo "\s*[a-zA-Z]+\s*$" | sed s/[[:space:]]//g > c.txt
+cat b.txt | tr -s '\n' | grep -Eo "^\s*[a-zA-Z]+\s*" | sed s/[[:space:]]//g > d.txt
+
+cat d.txt c.txt | sort | uniq -u
 
 
 #/**********  End  **********/#