在运行下面的猪脚本时，我在第 4 行收到错误：如果是 GROUP，那么我收到错误。如果我在第 4 行从“组”更改为“组”，则脚本正在运行。

组和组有什么区别？

LINES = LOAD '/user/cloudera/datapeople.csv' USING PigStorage(',') AS ( firstname:chararray, lastname:chararray, address:chararray, city:chararray, state:chararray, zip:chararray );

WORDS = FOREACH LINES GENERATE FLATTEN(TOKENIZE(zip)) AS ZIPS;

WORDSGROUPED = GROUP WORDS BY ZIPS;

WORDBYCOUNT = FOREACH WORDSGROUPED GENERATE GROUP AS ZIPS, COUNT(WORDS);

WORDSSORT = ORDER WORDBYCOUNT BY $1 DESC;

DUMP WORDSSORT;