4 tr a '[:not-a-class:]' < /dev/null
5 tr a '[:digit:]' < /dev/null
6 tr '[c*]' k < /dev/null
7 tr a '[=c=]' < /dev/null
8 tr a '[c*][c*]' < /dev/null
9 tr -ds abd '[c*]' < /dev/null
10 tr -c '[:lower:]' '[:upper:]' < /dev/null
11 tr '[:lower:]' '[:lower:]' < /dev/null
12 tr '0-9[:lower:]' '[:upper:]' < /dev/null
14 tr -s '\432' < /dev/null
15 tr a 'abc\' < /dev/null
19 # And make sure tr does the right thing when POSIXLY_... is set.