" " ' ' # = ! >= <= + - / * > < % & | ^ ~ } { : break close continue delete do else exit fflush for huge if in function next nextfile print printf return while atan2 cos exp gensub getline gsub index int length log match rand sin split sprintf sqrt srand sub substr system tolower toupper BEGIN END $0 ARGC ARGIND ARGV CONVFMT ENVIRON ERRNO FIELDSWIDTH FILENAME FNR FS IGNORECASE NF NR OFMT OFS ORS RLENGTH RS RSTART RT SUBSEP