IntStream.range(0, (s.size() - m +1))
        .forEach(
            pos-> {
                int sum = 
                IntStream.range(pos, (pos+m))
                    .map(e->s.get(e))
                    .sum();
                if(sum == d) {
                    possibleCombin.set(0, possibleCombin.get(0)+1);
                } 
            }
        );