#!/bin/sh

rm -f sortiert.txt
FIRST=`cat worte.txt | cut -b 1 | sort | tr "[:lower:]" "[:upper:]" | uniq`
for A in `echo $FIRST`; do
   G=` echo $A | tr "[:lower:]" "[:upper:]"`
   if [ "$G" == "B" ]; then 
      grep -i "^$A[0-9]" worte.txt | sort +0.1n >> sortiert.txt
      grep -i "^$A[^0-9]" worte.txt | sort  >> sortiert.txt
   else
     grep -i "^$A" worte.txt | sort   >> sortiert.txt
   fi
done