我有以下数据
11111 | aff | baucj | blah | blah
13331 | azvaff | bcacj | blah | blah
11111 | aasfff | aascj | blah | blah
13331 | aafzvff | baucj | blah | blah
12221 | arthrf | bacsfucj | blah | blah
12221 | ddhrhsd | hdafasfacj | blah | blah
我希望它们合并成
11111 | aff | baucj | blah | blah | 11111 | aasfff | aascj | blah | blah
13331 | azvaff | bcacj | blah | blah | 13331 | aafzvff | baucj | blah | blah
12221 | arthrf | bacsfucj | blah | blah | 12221 | ddhrhsd | hdafasfacj | blah | blah