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	for(i = (int)1e9; i > 1; i /= 100)
		switch((zahl/i) % 10)
		{
			case 0: printf("null ");   break;
			case 1: printf("eins ");   break;
			case 2: printf("zwei ");   break;
			case 3: printf("drei ");   break;
			case 4: printf("vier ");   break;
			case 5: printf("fuenf ");  break;
			case 6: printf("sechs ");  break;
			case 7: printf("sieben "); break;
			case 8: printf("acht ");   break;
			case 9: printf("neun ");   break;
		}