noc = int(input("how many coins do you want to play with?     "))
print("ok",noc,"coins it shall be")
nof = int(input("now how many coins per flip?     "))
print("super! We shall flip", nof, "coins at a time", "that's", noc,"coins by",nof,"flips")
go = input("type the word go and I shall tell you if the game can be done         ")


which_turn = noc - nof +1
turns_left = noc - which_turn

if noc / nof == 2:
    print("thats easy you can do it in 2 flips")

elif turns_left % 2 == 0:
    print("the last element will turn heads on turn number :", which_turn)
    print("")
    print(noc, "subtract ", which_turn, "= ", turns_left)
    print("")
    print("you can")

else:
    #if turn_left % 2 != 0:
    print("the last element will turn heads on turn number :", which_turn)
    print("")
    print(noc, "subtract ", which_turn, "= ", turns_left)
    print("")
    print(turns_left, "is odd..sorry you cant")