private boolean isComplementary(String first, String second){
		if(first.equals("A")){
			if(second.equals("T")){
				return true;
			}else{
				return false;
			}
		}else if(first.equals("T")){
			if(second.equals("A")){
				return true;
			}else{
				return false;
			}
		}else if(first.equals("C")){
			if(second.equals("G")){
				return true;
			}else{
				return false;
			}
		}else if(first.equals("G")){
			if(second.equals("C")){
				return true;
			}else{
				return false;
			}
		}else{
			return false;
		}
	}