const people = {
  ivan: {
    debts: {
      stamat: 2.55,
      trendafil: 1.85,
    },
    debtors: {},
  },
  stamat: {
    debts: {},
    debtors: {
      ivan: 2.55,
    },
  },
  trendafil: {
    debts: {},
    debtors: {
      ivan: 1.85,
    },
  }
};