The formula that relates the exact date of birth of a person with a number of the chemical element is:

where N - is the number of the chemical element in the Periodic Table;

x - day of birth (1 to 31);
y - birth month (1 to 12);
z - the penultimate digit of the year of birth (0 to 9);
u - the last digit of the year of birth (0 to 9).

To find out which chemical element determines your destiny, perform calculation using the formula; on the result only take the integer part, discarding decimals. If the result obtained by calculating a zero, then the final result is taken as equal to unity.

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TASK

All eTwinning project participants from different countries will determine their chemical elements, according a formula and date of birth.