def getdata(n):
    n -= 1
    alphabet = ('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z')

    rows = 1000000000
    columns = []
    current_column = 1
    current_row_first_val = 1
    for x in range(1,rows+1):
        if n < (x*702):
            current_column = x
            if x > 1:
                current_row_first_val = x*702-701
                index = current_row_first_val - n
            else:
                index = n
            break

    for x in alphabet:
        columns.append(x)

    for x in alphabet:
        for y in alphabet:
            columns.append(x+y)
    return str(current_column)+columns[index]