The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

The postage stamp with a picture of a Ukrainian tractor pulling a Russian tank is on sale in Kyiv, Ukraine on July 28, 2022. Many citizens line up for getting postmarks.( The Yomiuri Shimbun via AP Images )

This photograph taken in Kyiv on July 28, 2022 shows new Ukrainian stamps called "Good evening, we are from Ukraine!" released by Ukrposhta, Ukraine's national post. - The postage stamp represents the real events that took place in the Mykolaiv region, when Ukrainian farmers carried away a Russian tank with a tractor. (Photo by Sergei SUPINSKY / AFP)

A woman shows the new Ukrainian stamps called "Good evening, we are from Ukraine!" released by Ukrposhta, Ukraine's national post in Kyiv on July 28, 2022 - The postage stamp represents the real events that took place in the Mykolaiv region, when Ukrainian farmers carried away a Russian tank with a tractor. (Photo by Sergei SUPINSKY / AFP)

A woman marks the new Ukrainian stamps called "Good evening, we are from Ukraine!" released by Ukrposhta, Ukraine's national post in Kyiv on July 28, 2022 - The postage stamp represents the real events that took place in the Mykolaiv region, when Ukrainian farmers carried away a Russian tank with a tractor. (Photo by Sergei SUPINSKY / AFP)