I dont know how expensive Hanover is but my lord, give the lad some money, €815 a month is nothing. Minimum - for a non-drinking, non-smoking upright young chap - I would suggest an absolute minimum of €1200 a month...but take some advice from our Finns here, as they will probably know best...

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"A man's work is nothing but this slow trek to rediscover, through the detours of art, those two or three great and simple images in whose presence his heart first opened."