lines 17-21 look really strange to me
at line 18 did you mean for(j =0; j < 71; j++) ?
at line 22-36 you should use the OR operator: if (0 <= j || j <= 34)
at lines 38, 40 and 42 you used = instead of ==
at line 58 you should use single quotes: if (command == 'Y')
The loop at lines 54-60 is useless and would never stop