[None for r in[[i[-1]for a in[[[None,[int(i)%0xff for i in input().split()],input()+' ',{'0':0},'0',0,'',]]]for i in a if(i[5]']+[str(int(i[4])- 1)for _ in[None]if i[2][i[5]]is'<']+[i[4]]][0][0]),([[i[5]+([l for l in range(2,len(i[2])+1)if (i[2][i[5]:][:l].count('[')is i[2][i[5]:][:l].count(']'))][0])for _ in[None]if i[2][i[5]]is'['and not i[3][i[4]]]+[i[5]+(-[l for l in range(2,len(i[2])+1)if(i[2][:i[5]+1][::-1][:l].count('[')is i[2][:i[5]+1][::-1][:l].count(']'))][0]+1)for _ in[None]if i[2][i[5]]is']'and i[3][i[4]]]+[i[5]+1]][0][0]),[[i[6]+chr(i[3][i[4]])for _ in[None]if i[2][i[5]]is'.']+[i[6]]][0][0],]][0])]]if print(r[-1])]