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public class SplitString {
    /**
     * @param args
     */
   
    public static void main(String[] args) {
        String str = "ÖÐZellÖйú5000Äê,Congruations!";
        int bytes = 8;
        str = new SplitString().getSubString(str, bytes);
        System.out.println(str);
    }
        public String getSubString(String str,int bytes){
        int temp = bytes;
        byte [] AllBytes = str.getBytes();
        int AllStrByteLen = AllBytes.length;
        
        if(bytes > AllStrByteLen | bytes <= 0){
            return str;
        }
        int ChinaWordsNum = 0;
        for(int i=0;i<temp;i++){
            int IntOfByte = (int)AllBytes[i];
            if(IntOfByte < 0 ){
                ChinaWordsNum+=1;
            }
        }
        if(ChinaWordsNum%2 == 0){
            return  new String(AllBytes,0,temp);
        }else{
            if(bytes == 1){
                return null;
            }
 &


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