input question: Fix spacing: Thethirdlecturegivestheessentialstepsintheenumerationoftheseventeenspace-groupsoftwo-dimensionalcrystallography...[Inthefourthlecturehe]showshowthespecialtheoryofrelativityisessentiallythestudyoftheinherentsymmetryofthefour-dimensionalspace-timecontinuum,wherethesymmetryoperationsaretheLorentztransformations;andhowthesymmetryoperationsofanatom,accordingtoquantummechanics,includethepermutationsofitsperipheralelectrons.

output answer: The third lecture gives the essential steps in the enumeration of the seventeen space-groups of two-dimensional crystallography ... [In the fourth lecture he] shows how the special theory of relativity is essentially the study of the inherent symmetry of the four-dimensional space-time continuum, where the symmetry operations are the Lorentz transformations; and how the symmetry operations of an atom, according to quantum mechanics, include the permutations of its peripheral electrons.


input question: Fix spacing: JesperandIhavemezaforstarters:spicysausages,smokedmeat,ham,ajvar,tzatikiandmore.

output answer: Jesper and I have meza for starters: spicy sausages, smoked meat, ham, ajvar, tzatiki and more.


input question: Fix spacing: Ourinternetstorehavesuppliedallthesethings.Youareabletocomeandpurchasefreelywiththesmallestexpense.

output answer: Our internet store have supplied all these things. You are able to come and purchase freely with the smallest expense.


input question: Fix spacing: TheGovernmentalsoplanstoholdaGreenTransportWeekin2001toencouragebettertransporthabits.

output answer:
The Government also plans to hold a Green Transport Week in 2001 to encourage better transport habits.