+ محدودیت زمان: ۱ ثانیه + محدودیت حافظه: ۲۵۶ مگابایت ----------  Amin hates his chemistry class. Niloufar, who has not finished her chemistry assignments yet, turns to Amin for help with balancing chemical reactions. Balancing a reaction means adding coefficients in front of the reactants and products so that the number of each element on both sides of the reaction is equal. Amin has no idea what chemistry is, but he knows that chemical element names start with an uppercase letter, followed by lowercase letters. Help Amin to check whether the reaction is balanced or not. Note that the coefficients must be integers and should be in their simplest form. # ورودی The first line of input contains a positive integer $t$, representing the number of chemical reactions. $$1 \leq t \leq 100$$ In the next $t$ lines, each line contains a chemical reaction. $$1 \leq |s| \leq 100 $$ It is guaranteed that the coefficients are less than $100$. # خروجی For each test, if the reaction is balanced, print `YES`, otherwise print `NO` # مثال‌ها ## ورودی نمونه ۱ ``` 6 3H_2 + N_2 => 2NH_3 6CO_2 + 6H_2O => C_6H_{12}O_6 + 6O_2 3Ca(OH)_2 + 2H_3PO_4 => Ca_3(PO_4)_2 + 6H_2O 4H_2 + N_2 => 2NH_3 3CO_2 + 3H_2O => C_6H_{12}O_6 + O_2 Ca(OH)_2 + 2H_3PO_4 => Ca_3(PO_4)_2 + 2H_2O ```` ## خروجی نمونه ۱ ``` YES YES YES NO NO NO ````

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