func main()
	if(dbg)
		var ss: [][]char ::
		|["ABCDEFGHIJKLMNOPQRSTUVWXZABCDEFGHIJKLMNPQRSTVWXYZ"] ~
		|["BCDEFGHIJKLMNOPQSTUVWXYZABCDFGHIJKLMNOPQRSTUVWXYZ"] ~
		|["ABCDEFHJKLMNOPQRSTUWXYZABCDFGHIJKLMOPQRSTUVWXYZ"] ~
		|["ABCDEFGHIJKLMNOPQRSUVXYZABCDEFGHIJKLMNPQRSTUVWXYZ"] ~
		|["ABCDEFGHJKLMOPQRSUVWXYZABCDFHIJKLMNOPQRSTUVWXYZABCDFGHIJKLMNOPQTUVWXYZ"] ~
		|["ABCDEFGHIJKLMOPQRSTUVWXYZ"] ~
		|["BCDEFGHIJKLMOPQRSTUVWXYZABCEFGHIJKLMNOPQRSTUVWXYZ"] ~
		|["ABCDEFGHIJKLNOPQRSTUVWXYZ."] ~
		|["ABCDEFGHIJKLMNOPQRSTUVWXZABCDEFGHIJKLMNPQRSTVWXYZABCDEFGHIJKLMNOPQSTUVWXYZ"] ~
		|["ABCDEFGHIJKLMNOPQRSUVWXYZBCDEFGHIJKLMNOPQRTUVWXYZABCDEFGHIJLMNOPQRSTUVWXYZ"] ~
		|["ABCDEFGHJKLMNOPQRTUVWXYZ"] ~
		|["ABCDEFGHIJKLMNOPQRSUVWXYZABCDEFGHIJKLMNPQRSTUVWXYZ"] ~
		|["ABCDEGHJKLMOPQRSTUVWXYZABCEFGHIJKLMNOPQRSTUVWXYZ"] ~
		|["ABCDEFGHIJKLMNOPQRSUVWXYZABCDEFGIJKLMNOPQRSTUVWXYZABCDFGHIJKLMNOPQRSTUVWXYZ"] ~
		|["ABCDEGHIJKLMNOPQRSTUVWXYZBDEFGHIJKLMNOPQRSUVWXYZABCDEFGHIJKLMNPQSTUVWXYZABCDEFGHJKLMNOPQRSTUVWXYZBCDEFGHIJKMNOPQRSTUVWXYZ"] ~
		|["ABCDEFGHIJKLMNPQRSTUVWXYZABCDEGHIJKLMNOPQRSTUVWXYZ"] ~
		|["ABCDEFGHIJKLMOPQRSTUVWXYZ,"] ~
		|["ABCDEFGHIJKLNPQRSTUVWXYZABCEFGHIJKLMNOPQRSTVWXYZABCDEFGHIJKMNPQRSTUVWXYZ"] ~
		|["ABCDEFGHIJKLNOPQRSTUVWXYZ."]
		for _(0, ^ss - 1)
			var s: []char :: ss[_]
			var offset: int :: 0
			for i(0, ^s - 1)
				switch c(s[i])
				case 'A' to 'Z'
					while('A'.offset(offset % 26) <> c)
						do cui@print(['A'.offset(offset % 26)])
						do offset :+ 1
					end while
					do offset :+ 1
				default
					do cui@print([s[i]])
				end switch
			end for
			do cui@print(" ")
		end for
		do cui@print("\n")
	end if
	var ss: [][]char :: cui@input().split(" ")
	var N: int :: ss[0].toInt(&)
	var M: int :: ss[1].toInt(&)
	var ans: int :: 1
	if(N >= M)
		do ans :: 0
	else
		for n(1, N)
			do ans :* n
			do ans :% M
		end for
	end if
	do cui@print("\{ans}\n")
end func