Use of uninitialized value in sprintf at 11130005.pl line 20.
undef : ><
coercing at 11130005.pl line 10.
empty : ><
abcd : >abcd<
coercing at 11130005.pl line 10.
Value "abcde" did not pass type constraint "Undef|__ANON__" (in $_[0]) at 11130005.pl line 18
    "Undef|__ANON__" requires that the value pass "Undef" or "__ANON__"
    Value "abcde" did not pass type constraint "Undef"
        Value "abcde" did not pass type constraint "Undef"
        "Undef" is defined as: (!defined($_))
    Value "abcde" did not pass type constraint
        "__ANON__" is a subtype of "SimpleStr&StrLength[1,4]"
        "SimpleStr&StrLength[1,4]" requires that the value pass "SimpleStr" and "StrLength[1,4]"
        Value "abcde" did not pass type constraint "StrLength[1,4]"
        "StrLength[1,4]" expects length($_) to be between 1 and 4
        length($_) is 5