How to check that at least one input in a group has a value

I have some inputs in the following div

cy.get("div[data-test-letterinputcontainer='0']")

One of them have a value, but it is not known which. It could for example look like this

<div data-test-letterinputcontainer="0">
    <input value="" type="text">
    <input value="" type="text">
    <input value="f" type="text">
    <input value="" type="text">
    <input value="" type="text">
    <input value="" type="text">
</div>

or this

<div data-test-letterinputcontainer="0">
    <input value="g" type="text">
    <input value="" type="text">
    <input value="" type="text">
    <input value="" type="text">
    <input value="" type="text">
    <input value="" type="text">
</div>

How can I check that

• One input has a value
• The other input's are empty?

This should do the trick

cy.get("div[data-test-letterinputcontainer='0'] input")
  .then(($ele) => {
    let flag = false;
    for (let i = 0; i < $ele.length; i++) {
      if (Cypress.$($ele[i]).val().toString().length) {
        //in case we found another input with a value.
        if (flag) {
          return false;
        }
        //first time finding a value for input.
        flag = true;
      }
    }
    return flag;
  })
  .should('eq', true);