from greenery import fsm

def div_fsm(n, b):
    transitions = {}
    for r in range(n):
        transitions[r] = {}
        for c in range(b):
            nr = (r*b + c) % n
            transitions[r][str(c)] = nr

    return fsm.fsm(alphabet={str(c) for c in range(b)},
                   states=set(range(n)),
                   initial=0,
                   finals={0},
                   map=transitions)

print(div_fsm(7, 2).lego())

((1|2(1|2(02*1)*02*0)*(0|2(02*1)*2))(((0|12*1)(02*1)*0|1)2*0(1|2(02*1)*02*0)*(0|2(02*1)*2)|(0|12*1)(02*1)*2)*(((0|12*1)(02*1)*0|1)2*0(1|2(02*1)*02*0)*2(02*1)*1|(0|12*1)(02*1)*1|2)|0|2(1|2(02*1)*02*0)*2(02*1)*1)*

==================== 2 chars =====================
-d
==================================================
assign('Q',eval_input())
imp_print(minus(d,Q))
==================================================
Traceback (most recent call last):
  File "/opt/pyth/pyth.py", line 695, in <module>
  File "<string>", line 3, in <module>
  File "/opt/pyth/macros.py", line 632, in eval_input
EOFError: EOF when reading a line
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 53, in apport_excepthook