ciagZnakow = "komputer";
print len(ciagZnakow);
print ciagZnakow[0];
print ciagZnakow[4];
# print ciagZnakow[10]; <- błąd
print ciagZnakow[-1];
print ciagZnakow[-8];
print ciagZnakow[3:6];
print ciagZnakow[3:18];
Y2lhZ1puYWtvdyA9ICJrb21wdXRlciI7CnByaW50IGxlbihjaWFnWm5ha293KTsKcHJpbnQgY2lhZ1puYWtvd1swXTsKcHJpbnQgY2lhZ1puYWtvd1s0XTsKIyBwcmludCBjaWFnWm5ha293WzEwXTsgPC0gYsWCxIVkCnByaW50IGNpYWdabmFrb3dbLTFdOwpwcmludCBjaWFnWm5ha293Wy04XTsKcHJpbnQgY2lhZ1puYWtvd1szOjZdOwpwcmludCBjaWFnWm5ha293WzM6MThdOw==