sqrt srand stat study sub substr symlink syscall sysopen sysread
sysseek system syswrite tell telldir tie tied time times
truncate uc ucfirst umask undef unlink unpack unshift untie use
sqrt srand stat study sub substr symlink syscall sysopen sysread
sysseek system syswrite tell telldir tie tied time times
truncate uc ucfirst umask undef unlink unpack unshift untie use