public boolean typeString(String op1, String literal1, String op2, String literal2){
		if (literal1.equals(literal2)){
			if (op1.equals(op2)){
				return true;
			}else{
				return false;
			}
		}else{ //if (!literal1.equals(literal2)){
			if (op1.equals("=") && op2.equals("=")){
				return false;
			}else{
				return true;
			}
		}
	}