def validate(string)
regex = /[^a-zA-Z0-9]$/
if(string =~ regex)
return "true"
else
return "false"
end
end
puts validate(".")
ZGVmIHZhbGlkYXRlKHN0cmluZykKICAgIHJlZ2V4ID0gL1teYS16QS1aMC05XSQvCiAgICBpZihzdHJpbmcgPX4gcmVnZXgpCiAgICAgICAgcmV0dXJuICJ0cnVlIgogICAgZWxzZQogICAgICAgIHJldHVybiAiZmFsc2UiCiAgICAgZW5kCmVuZApwdXRzIHZhbGlkYXRlKCIuIik=