#!/usr/bin/python
# -*- coding: utf-8 -*-

'''Check if the given EGN (Bulgarian Universal Citizen Number) is valid.'''

def EGNcheck(EGN):
    '''Check if the given EGN (Bulgarian Universal Citizen Number) is valid.'''
    if len(EGN) != 10:
        return False
    multipliers = (2, 4, 8, 5, 10, 9, 7, 3, 6)
    sum = 0
    for i in range(9):
        sum += int(EGN[i]) * multipliers[i]
    sum %= 11
    if sum > 9:
        sum = 0 # hmm? should it not just subtract 10?
    # print "sum = %i, EGN[9] = %s" % (sum, EGN[9])
    return int(EGN[9]) == sum

if __name__ == '__main__':
    import sys
    if len(sys.argv) < 2:
        print '''\
This program check if the given EGN (Universal Citizen Number)
is valid in Bulgaria. All EGNs are accepted as arguments.
'''
    else:
        print "EGN check version 1.0, by Mr.700"
        for arg in sys.argv[1:]:
            if EGNcheck(arg):
                print arg + " - OK"
            else:
                print arg + " - BAD"