All answers will be:

1. alphanumeric,
2. lowercase, with
3. no spaces, and
4. will not contain non-alphanumeric characters.

Example: "Th3 pr3s3n7 is 7h3irs; 7h3 fu7ur3, f0r which I r3a11y w0rk3d, is min3." would then become:
"th3pr3s3n7is7h3irs7h3fu7ur3f0rwhichir3a11yw0rk3dismin3"