fun test(s: String)
do
print s.length
- print s.first
- print s.last
- print s[2]
+ print s.chars.first
+ print s.chars.last
+ print s.chars[2]
print s.substring(1, 2)
print s.substring(-1, 2)
print s.substring(1, 0)
print s == "abcde"
print s < "abcdf"
print s > "abcdd"
+ print s > "abcd"
+ print s < "abcdef"
print "z" + s + "z" == "zabcdez"
end