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Z36 is the additive group of all integers from 0 to 35 modulus 36.
Its subgroups are:
1) of the order 2: {0,18};
2) of the order 3: {0,12,24};
3) of the order 4: {0,9,18,27};
4) of the order 6: {0,6,12,18,24,30};
5) of the order 9: {0,4,8,12,16,20,24,28,32};
6) of the order 12: {0,3,6,9,12,15,18,21,24,27,30,33};
7) of the order 18: {0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34}.
That's all.
All these groups are cyclic.