Liza Stark and her boyfriend Alex Goldmark made a deal to only communicate using emoji icons for 30 days. According to the couple, this was a way for them to see how strong their relationship is, New Tech City reported.

Before starting with the experiment, the two downloaded all of the available emoji apps. They then switched to WeChat, a Chinese messaging service, instead of texting because it offered them more symbol options.

Stark and Goldmark then chose icons to represent themselves. The symbols also meant the words "I" or "me" in their messages. For Goldmark, he chose the icon of a boy wearing a helmet while Stark went for a female character with brown hair.

The two quickly realized that interpreting a line of emojis literally is the best way to communicate using the icons, according to the Daily Mail.

"It works best when you can be literal with the icons and treat them like they are Chinese characters," Goldmark commented. "Each one means a word or a sound that could add up to a word. Like toilet plus paper equals toilet paper."

As for the downside, the couple noted that it was a bit challenging to explain certain situations using only emojis.

For instance, during the duration of the experiment, the two were supposed to get together for a couple of drinks after work. However, due to a death of a family friend, Stark had to tell her boyfriend that their plans for the night have been cancelled.

Using only emojis, Stark tried as best as she could to explain the situation to her boyfriend, Yahoo reported.

"I sent you a pair of girls and an older woman's face and a skull and a sad face and then an Alex face (boy with helmet) with the red circle with the strike through then a bus and then drinks," Stark said to Goldmark.

"This is me saying 'Alex an older friend of my family has died, we are having a girls night, don't come to drinks,'" she added.

Despite encountering some difficulties, the two agreed that using emojis is a better way of conveying their emotions rather than saying or texting them plainly.

"It felt fuller than if you had sent something," Stark explained. "Somebody telling you that they love you is a great and beautiful and wonderful thing, but getting those stickers, getting those emojis, was a different experience."

Goldmark added that the experiment expanded their emotional vocabulary and taught them different ways to express their feelings for each other.